* stable-2.16:
GroupsUpdate: Add trace timer on group creation/update operations
GroupsUpdate: Add debug log on cache eviction for group creation/update
GroupsUpdate: Rename update... methods to evict...
VersionedMetaData: Convert debug log of read/save file to trace timers
TraceContext: Support fourth format parameter
TestAccount: Add implementation of toString
Correct URL of change message requests in docs
Fixing Linux Kernel URL in Why Code Review Doc
ExternalIdNotes: Only log 'reading external ID note map' when actually doing so
RestApiException: Fix Javadoc
Fix groups to prevent javascript errors with url
Change-Id: Ie5c73b3424c62b9e664ec16b7699ae4194a194cc
0a16d95222