Bug 509: Fixed incorrect merging of Data Store Writes / Events

ForwardedBackwardsCompatibleDataBroker:

In old Data API only way to replace element was to use
remove/put combination, which changed with new Async DOM Broker
APIs where put is actually add/replace so previous delete is not
neccessary.

BackwardsCompatibleTransaction keeps track of such remove/put
operations and propagates put-only to new Async Data Transaction.

DOMImmutableDataChangeEvent:

Builder for DOMImmutableDataChange event used ImmutableMap builder
which throws IllegalArgumentException when same key/value combo
is overriden, which made impossible to merge some events. Switched
Builder implementation to use combination of HashMap and
ImmutableMap.copyOf() in order to prevent this
IllegalArgumentException to fail commit process.

Change-Id: I935bd4f5499c26190c52adcaee1df6335640bfaf
Signed-off-by: Tony Tkacik <ttkacik@cisco.com>
Change OpenEXI version to -SNAPSHOT

This fixes the merge job failing because it cannot publish a released
artifact.

Change-Id: I6e2eeb5ef8e9e521df40a77c12ff8ae94436d16d
Signed-off-by: Robert Varga <rovarga@cisco.com>
Merge "Bug 509: Fixed incorrect merging of Data Store Writes / Events"