Manage analytics client to avoid leaks

[hubertp]

Pull Request Description

This change makes sure to close the Google Analytics client after usage. This will a) ensure that resources are released properly b) potentially fix the exception that is causing problems on some platforms

Important Notes

After this change I no longer see in my logs:

 io.grpc.internal.ManagedChannelOrphanWrapper$ManagedChannelReference cleanQueue
SEVERE: *~*~*~ Previous channel ManagedChannelImpl{logId=1, target=analyticsdata.googleapis.com:443} was not shutdown properly!!! ~*~*~*
    Make sure to call shutdown()/shutdownNow() and wait until awaitTermination() returns true.
java.lang.RuntimeException: ManagedChannel allocation site
	at io.grpc.internal.ManagedChannelOrphanWrapper$ManagedChannelReference.<init>(ManagedChannelOrphanWrapper.java:102)
	at io.grpc.internal.ManagedChannelOrphanWrapper.<init>(ManagedChannelOrphanWrapper.java:60)
	at io.grpc.internal.ManagedChannelOrphanWrapper.<init>(ManagedChannelOrphanWrapper.java:51)
	at io.grpc.internal.ManagedChannelImplBuilder.build(ManagedChannelImplBuilder.java:668)
	at io.grpc.ForwardingChannelBuilder2.build(ForwardingChannelBuilder2.java:260)
	at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.createSingleChannel(InstantiatingGrpcChannelProvider.java:436)
	at com.google.api.gax.grpc.ChannelPool.<init>(ChannelPool.java:107)
	at com.google.api.gax.grpc.ChannelPool.create(ChannelPool.java:85)
	at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.createChannel(InstantiatingGrpcChannelProvider.java:243)
	at com.google.api.gax.grpc.InstantiatingGrpcChannelProvider.getTransportChannel(InstantiatingGrpcChannelProvider.java:237)
	at com.google.api.gax.rpc.ClientContext.create(ClientContext.java:226)
	at com.google.analytics.data.v1beta.stub.GrpcBetaAnalyticsDataStub.create(GrpcBetaAnalyticsDataStub.java:217)
	at com.google.analytics.data.v1beta.stub.BetaAnalyticsDataStubSettings.createStub(BetaAnalyticsDataStubSettings.java:288)
	at com.google.analytics.data.v1beta.BetaAnalyticsDataClient.<init>(BetaAnalyticsDataClient.java:376)
	at com.google.analytics.data.v1beta.BetaAnalyticsDataClient.create(BetaAnalyticsDataClient.java:358)
	at org.graalvm.truffle/com.oracle.truffle.host.HostMethodDesc$SingleMethod$MHBase.invokeHandle(HostMethodDesc.java:371)

It's important because apparently that's where it would get stuck when trying to log that message.

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• All code follows the
  Scala,
  Java,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• All code has been tested:
  • If GUI codebase was changed, the GUI was tested when built using ./run ide build.

[JaroslavTulach]

Why this line uses Managed _Resource and the line 24 is using...

[JaroslavTulach]

Invoking a type looks like a coding mistake.

[JaroslavTulach]

...this line is using Managed_Resource.register while line 19 only Managed_Resource.