Update pull request CI job environment in prep for Java 17 update

.ci/jobs.t/elastic+elasticsearch+pull-request+bwc.yml

@@ -31,7 +31,7 @@
             RUNTIME_JAVA_HOME=$HOME/.java/$ES_RUNTIME_JAVA
             JAVA8_HOME=$HOME/.java/java8
             JAVA11_HOME=$HOME/.java/java11
-            JAVA15_HOME=$HOME/.java/openjdk15
+            JAVA16_HOME=$HOME/.java/openjdk16
       - shell: |
           #!/usr/local/bin/runbld --redirect-stderr
           $WORKSPACE/.ci/scripts/run-gradle.sh -Dignore.tests.seed bwcTestSnapshots

.ci/jobs.t/elastic+elasticsearch+pull-request+full-bwc.yml

@@ -44,7 +44,7 @@
             RUNTIME_JAVA_HOME=$HOME/.java/$ES_RUNTIME_JAVA
             JAVA8_HOME=$HOME/.java/java8
             JAVA11_HOME=$HOME/.java/java11
-            JAVA15_HOME=$HOME/.java/openjdk15
+            JAVA16_HOME=$HOME/.java/openjdk16
       - shell: |
           #!/usr/local/bin/runbld --redirect-stderr
           $WORKSPACE/.ci/scripts/run-gradle.sh -Dignore.tests.seed v$BWC_VERSION#bwcTest

.ci/jobs.t/elastic+elasticsearch+pull-request+packaging-upgrade-tests.yml

@@ -47,7 +47,7 @@
             RUNTIME_JAVA_HOME=$HOME/.java/$ES_RUNTIME_JAVA
             JAVA8_HOME=$HOME/.java/java8
             JAVA11_HOME=$HOME/.java/java11
-            JAVA15_HOME=$HOME/.java/openjdk15
+            JAVA16_HOME=$HOME/.java/openjdk16
       - shell: |
           #!/usr/local/bin/runbld --redirect-stderr
           ./.ci/os.sh --build-cache -Dorg.elasticsearch.build.cache.url=https://gradle-enterprise.elastic.co/cache/ destructiveDistroUpgradeTest.v$BWC_VERSION

.ci/jobs.t/elastic+elasticsearch+pull-request+part-1-fips.yml

@@ -33,7 +33,7 @@
           properties-content: |
             JAVA_HOME=$HOME/.java/$ES_BUILD_JAVA
             RUNTIME_JAVA_HOME=$HOME/.java/$ES_RUNTIME_JAVA
-            JAVA15_HOME=$HOME/.java/openjdk15
+            JAVA16_HOME=$HOME/.java/openjdk16
       - shell: |
           #!/usr/local/bin/runbld --redirect-stderr
           $WORKSPACE/.ci/scripts/run-gradle.sh -Dignore.tests.seed -Dtests.fips.enabled=true checkPart1

.ci/jobs.t/elastic+elasticsearch+pull-request+part-1-windows.yml

@@ -33,7 +33,7 @@
           properties-content: |
             JAVA_HOME=$USERPROFILE\\.java\\$ES_BUILD_JAVA
             RUNTIME_JAVA_HOME=$USERPROFILE\\.java\\$ES_RUNTIME_JAVA
-            JAVA15_HOME=$USERPROFILE\\.java\\openjdk15
+            JAVA16_HOME=$USERPROFILE\\.java\\openjdk16
             GRADLE_TASK=checkPart1
       - batch: |
           del /f /s /q %USERPROFILE%\.gradle\init.d\*.*

.ci/jobs.t/elastic+elasticsearch+pull-request+part-2-fips.yml

@@ -33,7 +33,7 @@
           properties-content: |
             JAVA_HOME=$HOME/.java/$ES_BUILD_JAVA
             RUNTIME_JAVA_HOME=$HOME/.java/$ES_RUNTIME_JAVA
-            JAVA15_HOME=$HOME/.java/openjdk15
+            JAVA16_HOME=$HOME/.java/openjdk16
       - shell: |
           #!/usr/local/bin/runbld --redirect-stderr
           $WORKSPACE/.ci/scripts/run-gradle.sh -Dignore.tests.seed -Dtests.fips.enabled=true checkPart2

.ci/jobs.t/elastic+elasticsearch+pull-request+part-2-windows.yml

@@ -33,7 +33,7 @@
           properties-content: |
             JAVA_HOME=$USERPROFILE\\.java\\$ES_BUILD_JAVA
             RUNTIME_JAVA_HOME=$USERPROFILE\\.java\\$ES_RUNTIME_JAVA
-            JAVA15_HOME=$USERPROFILE\\.java\\openjdk15
+            JAVA16_HOME=$USERPROFILE\\.java\\openjdk16
             GRADLE_TASK=checkPart2
       - batch: |
           del /f /s /q %USERPROFILE%\.gradle\init.d\*.*

.ci/jobs.t/elastic+elasticsearch+pull-request+release-tests.yml

@@ -35,7 +35,7 @@
             RUNTIME_JAVA_HOME=$HOME/.java/$ES_RUNTIME_JAVA
             JAVA8_HOME=$HOME/.java/java8
             JAVA11_HOME=$HOME/.java/java11
-            JAVA15_HOME=$HOME/.java/openjdk15
+            JAVA16_HOME=$HOME/.java/openjdk16
       - shell: |
           #!/usr/local/bin/runbld --redirect-stderr
 

.ci/jobs.t/elastic+elasticsearch+pull-request+rest-compatibility.yml

@@ -34,7 +34,7 @@
             RUNTIME_JAVA_HOME=$HOME/.java/$ES_RUNTIME_JAVA
             JAVA8_HOME=$HOME/.java/java8
             JAVA11_HOME=$HOME/.java/java11
-            JAVA15_HOME=$HOME/.java/openjdk15
+            JAVA16_HOME=$HOME/.java/openjdk16
       - shell: |
           #!/usr/local/bin/runbld --redirect-stderr
           $WORKSPACE/.ci/scripts/run-gradle.sh -Dignore.tests.seed checkRestCompat

.ci/packer_cache.sh

@@ -19,7 +19,7 @@ if [ "$(uname -m)" = "arm64" ] || [ "$(uname -m)" = "aarch64" ]; then
   ## On ARM we use a different properties file for setting java home
   ## Also, we don't bother attempting to resolve dependencies for the 6.8 branch
   source $(dirname "${SCRIPT}")/java-versions-aarch64.properties
-  export JAVA15_HOME="${HOME}"/.java/jdk15
+  export JAVA16_HOME="${HOME}"/.java/jdk16
 else
   source $(dirname "${SCRIPT}")/java-versions.properties
   ## We are caching BWC versions too, need these so we can build those
@@ -29,6 +29,7 @@ else
   export JAVA13_HOME="${HOME}"/.java/openjdk13
   export JAVA14_HOME="${HOME}"/.java/openjdk14
   export JAVA15_HOME="${HOME}"/.java/openjdk15
+  export JAVA16_HOME="${HOME}"/.java/openjdk16
 
   ## 6.8 branch is not referenced from any bwc project in master so we need to
   ## resolve its dependencies explicitly

.ci/templates.t/pull-request-gradle-unix.yml

@@ -30,7 +30,7 @@
             RUNTIME_JAVA_HOME=$HOME/.java/$ES_RUNTIME_JAVA
             JAVA8_HOME=$HOME/.java/java8
             JAVA11_HOME=$HOME/.java/java11
-            JAVA15_HOME=$HOME/.java/openjdk15
+            JAVA16_HOME=$HOME/.java/openjdk16
       - shell: |
           #!/usr/local/bin/runbld --redirect-stderr
           $WORKSPACE/.ci/scripts/run-gradle.sh {gradle-args}