Bug 1203: Reset state of LocationDispatchCodecs

LocationDispatchCodecs must react to schema
context change, which may introduce changes
of locations, in which they are used.

This actually requires reinitialization of these
codecs (cases, augmentations) in order to discover
newly introduced case classes or augmentation classes
or to disable unload ones.

Initialization of codecs is done lazily and uses
same code-path as their first use.

Change-Id: I621edcfbe4bd29612e3358aa2e507b14e3002524
Signed-off-by: Tony Tkacik <ttkacik@cisco.com>
Merge "Bug 1203: Reset state of LocationDispatchCodecs"