KAFKA-7660: fix streams and Metrics memory leaks

[vvcephei]

Backport two memory-leak fixes (#5974 and #5953) (see also 2.1: #5979, 2.0: #5980, 1.1: #5981 )

It looks like we already had the parentSensors fix in 1.0 and lost it in 2.0. The change in
this PR just tidies it up a little for consistency with later branches.

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[vvcephei]

@ijuma , sorry to spam you, but I think it might be easier to deal with this in a batch...
The 1.0 branch builder also seems to be misconfigured; the failures for JDK7 and JDK10 are the same as #5981 (comment) (see also #5980 (comment))

[mjsax]

Retest this please

[ijuma]

retest this please

[ijuma]

This branch doesn't work fully with Java 10 either, just Java 9. The 10 failures with Java 10 are expected.

[vvcephei]

Just to clarify about the expected failure. It seems to be an incompatibility between java 10 and easymock:

org.apache.kafka.common.record.FileRecordsTest.testTruncateNotCalledIfSizeIsBiggerThanTargetSize

Error Message
java.lang.IllegalArgumentException
Stacktrace
java.lang.IllegalArgumentException
	at org.easymock.asm.ClassReader.<init>(Unknown Source)
	at org.easymock.asm.ClassReader.<init>(Unknown Source)
	at org.easymock.asm.ClassReader.<init>(Unknown Source)
	at org.easymock.cglib.proxy.BridgeMethodResolver.resolveAll(BridgeMethodResolver.java:63)
	at org.easymock.cglib.proxy.Enhancer.emitMethods(Enhancer.java:1132)
	at org.easymock.cglib.proxy.Enhancer.generateClass(Enhancer.java:630)
	at org.easymock.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
	at org.easymock.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:329)
	at org.easymock.cglib.proxy.Enhancer.generate(Enhancer.java:492)
	at org.easymock.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:93)
	at org.easymock.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:91)
	at org.easymock.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at org.easymock.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61)
	at org.easymock.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)
	at org.easymock.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:116)
	at org.easymock.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291)
	at org.easymock.cglib.proxy.Enhancer.createHelper(Enhancer.java:480)
	at org.easymock.cglib.proxy.Enhancer.createClass(Enhancer.java:337)
	at org.easymock.internal.ClassProxyFactory.createProxy(ClassProxyFactory.java:173)
	at org.easymock.internal.MocksControl.createMock(MocksControl.java:116)
	at org.easymock.internal.MocksControl.createMock(MocksControl.java:95)
	at org.easymock.EasyMock.mock(EasyMock.java:69)
	at org.easymock.EasyMock.createMock(EasyMock.java:311)
	at org.apache.kafka.common.record.FileRecordsTest.testTruncateNotCalledIfSizeIsBiggerThanTargetSize(FileRecordsTest.java:225)

[ijuma]

Yeah, the ASM version used by EasyMock in this branch is too old.