[java] Setting language level to 11 in IDEA project to allow new features in tests, let bazel control Java 8 conformance in the main subtree.
<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
- <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+ <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_11">
<output url="file://$MODULE_DIR$/build/production" />
<output-test url="file://$MODULE_DIR$/build/test" />
<exclude-output />
