Bug 2175 - Migrate frm, statistics and inventory manager to config subsystem

* migrated statistics manager to config subsystem
* updated tests
* patch resolves Bug 1646 and Bug 2079
* Patch Set 6 - add log.warn msg for a fail loading xml ConfigSubsystem input value + fix MIN_REQUEST_NET_MONITOR_INTERVAL_DEFAULT to 3sec (follow Anil's comment)

Change-Id: I67d398c82c3dafbb2ef759d07a80d17ad6656c1e
Signed-off-by: Jan Hajnar <jhajnar@cisco.com>
Signed-off-by: Vaclav Demcak <vdemcak@cisco.com>
BUG 2335 : Add jolokia feature

This is to make it easy to install jolokia. Earlier it was
possible to install the jolokia bundle the feature just makes
it more convenient.

With this patch I have created a placeholder for extra features. This is
where tiny little utility features of the controller can be put in.

Change-Id: Ifd980656d368902b13834e1e77783151536ca87c
Signed-off-by: Moiz Raja <moraja@cisco.com>
Merge "BUG 2335 : Add jolokia feature"