Add instrumentation to MetadataCache
Add some more metrics, fix typo
Change name of a metric
Add locator to cache size
Make Type and unit processing configurable
Fix the name of metric registry
Catch exception with metric registration
Merge branch 'chinmay/add_more_instrumentation_to_metadat_cache' into chinmay/disable_type_unit_processing

* chinmay/add_more_instrumentation_to_metadat_cache:
  Catch exception with metric registration
  Fix the name of metric registry
  Make Type and unit processing configurable
  Add locator to cache size
  Change name of a metric
  Add some more metrics, fix typo
  Add instrumentation to MetadataCache

Conflicts:
	blueflood-core/src/main/java/com/rackspacecloud/blueflood/service/CoreConfig.java