Fix classpath for example build integration tests (#81837)

This fixes two classpath issues for integration tests in the example
build

1. adds log4j to the runtime classpath where needed
2. removes exclude of jakarta json which was added as a workaround for

https://github.com/elastic/elasticsearch-java/issues/47

plugins/examples/custom-settings/build.gradle

@@ -21,3 +21,6 @@ testClusters.configureEach {
   keystore 'custom.secured', 'password'
 }
 
+dependencies {
+  yamlRestTestRuntimeOnly "org.apache.logging.log4j:log4j-core:${log4jVersion}"
+}

plugins/examples/custom-significance-heuristic/build.gradle

@@ -15,3 +15,7 @@ esplugin {
   licenseFile rootProject.file('SSPL-1.0+ELASTIC-LICENSE-2.0.txt')
   noticeFile rootProject.file('NOTICE.txt')
 }
+
+dependencies {
+  yamlRestTestRuntimeOnly "org.apache.logging.log4j:log4j-core:${log4jVersion}"
+}

plugins/examples/custom-suggester/build.gradle

@@ -19,3 +19,7 @@ esplugin {
 testClusters.configureEach {
   numberOfNodes = 2
 }
+
+dependencies {
+  yamlRestTestRuntimeOnly "org.apache.logging.log4j:log4j-core:${log4jVersion}"
+}

plugins/examples/painless-whitelist/build.gradle

@@ -19,6 +19,7 @@ esplugin {
 
 dependencies {
   compileOnly "org.elasticsearch.plugin:elasticsearch-scripting-painless-spi:${elasticsearchVersion}"
+  yamlRestTestRuntimeOnly "org.apache.logging.log4j:log4j-core:${log4jVersion}"
 }
 
 testClusters.configureEach {

plugins/examples/rescore/build.gradle

@@ -15,3 +15,7 @@ esplugin {
   licenseFile rootProject.file('SSPL-1.0+ELASTIC-LICENSE-2.0.txt')
   noticeFile rootProject.file('NOTICE.txt')
 }
+
+dependencies {
+  yamlRestTestRuntimeOnly "org.apache.logging.log4j:log4j-core:${log4jVersion}"
+}

plugins/examples/rest-handler/build.gradle

@@ -15,3 +15,7 @@ esplugin {
   licenseFile rootProject.file('SSPL-1.0+ELASTIC-LICENSE-2.0.txt')
   noticeFile rootProject.file('NOTICE.txt')
 }
+
+dependencies {
+  yamlRestTestRuntimeOnly "org.apache.logging.log4j:log4j-core:${log4jVersion}"
+}

plugins/examples/script-expert-scoring/build.gradle

@@ -15,3 +15,7 @@ esplugin {
   licenseFile rootProject.file('SSPL-1.0+ELASTIC-LICENSE-2.0.txt')
   noticeFile rootProject.file('NOTICE.txt')
 }
+
+dependencies {
+  yamlRestTestRuntimeOnly "org.apache.logging.log4j:log4j-core:${log4jVersion}"
+}

plugins/examples/security-authorization-engine/build.gradle

@@ -12,14 +12,11 @@ esplugin {
 
 dependencies {
   compileOnly "org.elasticsearch.plugin:x-pack-core:${elasticsearchVersion}"
-  testImplementation "org.apache.logging.log4j:log4j-core:2.11.1"
+  testImplementation "org.apache.logging.log4j:log4j-core:${log4jVersion}"
   testImplementation "org.elasticsearch.plugin:x-pack-core:${elasticsearchVersion}"
   javaRestTestImplementation "org.elasticsearch.plugin:x-pack-core:${elasticsearchVersion}"
-  javaRestTestImplementation "org.apache.logging.log4j:log4j-core:2.11.1"
-  javaRestTestImplementation("co.elastic.clients:elasticsearch-java:${elasticsearchVersion}") {
-    // See: https://github.com/elastic/elasticsearch-java/issues/47
-    exclude module: 'jakarta.json-api'
-  }
+  javaRestTestImplementation "org.apache.logging.log4j:log4j-core:${log4jVersion}"
+  javaRestTestImplementation("co.elastic.clients:elasticsearch-java:${elasticsearchVersion}")
   javaRestTestImplementation "org.elasticsearch.client:elasticsearch-rest-client:${elasticsearchVersion}"
   javaRestTestImplementation 'com.fasterxml.jackson.core:jackson-databind:2.12.3'
   javaRestTestImplementation "org.elasticsearch.test:framework:${elasticsearchVersion}"

plugins/examples/settings.gradle

@@ -18,6 +18,7 @@ gradle.rootProject {
       def props = new Properties()
       props.load(is)
       elasticsearchVersion = "${props.get('elasticsearch')}-SNAPSHOT"
+      log4jVersion = props.get('log4j')
     }
   }
 }