Upgrade HPPC to version 0.8.1 (#43025)

server/build.gradle

@@ -101,7 +101,7 @@ dependencies {
 
   // utilities
   compile project(":libs:elasticsearch-cli")
-  compile 'com.carrotsearch:hppc:0.7.1'
+  compile 'com.carrotsearch:hppc:0.8.1'
 
   // time handling, remove with java 8 time
   compile "joda-time:joda-time:${versions.joda}"

server/licenses/hppc-0.7.1.jar.sha1

@@ -1 +0,0 @@
-8b5057f74ea378c0150a1860874a3ebdcb713767

server/licenses/hppc-0.8.1.jar.sha1

@@ -0,0 +1 @@
+ffc7ba8f289428b9508ab484b8001dea944ae603