[SPARK-28701][TEST-HADOOP3.2][TEST-JAVA11][K8S] adding java11 support for pull request builds

## What changes were proposed in this pull request?

we need to add the ability to test PRBs against java11.

see comments here:  https://github.com/apache/spark/pull/25405

## How was this patch tested?

the build system will test this.

Closes #25423 from shaneknapp/spark-prb-java11.

Authored-by: shane knapp <incomplete@gmail.com>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>

dev/run-tests-jenkins.py

@@ -168,7 +168,7 @@ def main():
     #     against master.
     ghprb_pull_id = os.environ["ghprbPullId"]
     ghprb_actual_commit = os.environ["ghprbActualCommit"]
-    ghprb_pull_title = os.environ["ghprbPullTitle"]
+    ghprb_pull_title = os.environ["ghprbPullTitle"].lower()
     sha1 = os.environ["sha1"]
 
     # Marks this build as a pull request build.

dev/run-tests.py

@@ -404,6 +404,12 @@ def run_scala_tests(build_tool, hadoop_version, test_modules, excluded_tags):
     if excluded_tags:
         test_profiles += ['-Dtest.exclude.tags=' + ",".join(excluded_tags)]
 
+    # set up java11 env if this is a pull request build with 'test-java11' in the title
+    if "test-java11" in os.environ["ghprbPullTitle"].lower():
+        os.environ["JAVA_HOME"] = "/usr/java/jdk-11.0.1"
+        os.environ["PATH"] = "%s/bin:%s" % (os.environ["JAVA_HOME"], os.environ["PATH"])
+        test_profiles += ['-Djava.version=11']
+
     if build_tool == "maven":
         run_scala_tests_maven(test_profiles)
     else:
@@ -565,6 +571,7 @@ def main():
         changed_files = identify_changed_files_from_git_commits("HEAD", target_branch=target_branch)
         changed_modules = determine_modules_for_files(changed_files)
         excluded_tags = determine_tags_to_exclude(changed_modules)
+
     if not changed_modules:
         changed_modules = [modules.root]
         excluded_tags = []

resource-managers/kubernetes/integration-tests/dev/dev-run-integration-tests.sh

@@ -33,6 +33,7 @@ SERVICE_ACCOUNT=
 CONTEXT=
 INCLUDE_TAGS="k8s"
 EXCLUDE_TAGS=
+JAVA_VERSION="8"
 MVN="$TEST_ROOT_DIR/build/mvn"
 
 SCALA_VERSION=$("$MVN" help:evaluate -Dexpression=scala.binary.version 2>/dev/null\
@@ -99,6 +100,10 @@ while (( "$#" )); do
       R_IMAGE_NAME="$2"
       shift
       ;;
+    --java-version)
+      JAVA_VERSION="$2"
+      shift
+      ;;
     *)
       break
       ;;
@@ -107,6 +112,7 @@ while (( "$#" )); do
 done
 
 properties=(
+  -Djava.version=$JAVA_VERSION \
   -Dspark.kubernetes.test.sparkTgz=$SPARK_TGZ \
   -Dspark.kubernetes.test.imageTag=$IMAGE_TAG \
   -Dspark.kubernetes.test.imageRepo=$IMAGE_REPO \