BUG-868: remove the use of Javassist.init()

The init method, as well as setPool() have been deprecated. Prefer the
in-one-go costructor.

Change-Id: I73298d3b36502c0bad0c09f2f7f2d87bb67bbb37
Signed-off-by: Robert Varga <rovarga@cisco.com>
BUG-509: move snapshotCache get out of try block

This just moves the get which cannot throw out of the 'catch Exception'
block.

Change-Id: I936e987fa6b9e8b3eecb35656c586e3afb070046
Signed-off-by: Robert Varga <rovarga@cisco.com>
BUG-509: break up SchemaAwareApplyOperation

This patch breaks up the SchemaAwareApplyOperation class by moving its
abstract subclasses out, allowing their subclasses to be retained within
them. This will allow to better understand the relationships between the
classes.

Change-Id: I0acf48fa7c38d600fe38a8ec9951858f46be18e0
Signed-off-by: Robert Varga <rovarga@cisco.com>