Added @TestLogging annotation to set a specific level per test method

 It supports multiple logger:level comma separated key value pairs
 Use the _root keyword to set the root logger level
 e.g. @Logging("_root:DEBUG,org.elasticsearch.cluster.metadata:TRACE")
 or just @TestLogging("_root:DEBUG,cluster.metadata:TRACE") since we start the test with -Des.logger.prefix=
Restored log lines to TRACE for notification post alias creation and open/close index
Introduced specific log level for those in OpenCloseIndexTests#testCloseOpenAliasMultipleIndices
Fixed typo: renamed test.listerners package to test.listener
Fixed typo: renamed test wamer package to warmer