[maven-release-plugin] prepare release 1.5.2
ACCUMULO-3137 update data version to force a check for outstanding FATE
operations, and reorganize the constants that represent upgrade steps.
ACCUMULO-3143 Offline scan property is now being properly serialized. Added verification that all other booleans are being serialized.
Merge branch '1.6.1-SNAPSHOT'
ACCUMULO-2916 Upgrading zookeeper to 3.4.*.
ACCUMULO-3048 Bump to 1.5.3-SNAPSHOT
ACCUMULO-3049 close the connections to the tservers
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/accumulo
ACCUMULO-3049 close the connections to the tservers
Merge branch '1.6.1-SNAPSHOT'
ACCUMULO-3150 Set 0 for monitor log4j port config value

The rest of the code is already in place to support
a randomly chosen port for the log4j forwarding to
the monitor. We just need to configure MAC to do this.

Added a test to ensure that ports we want to have
a value of '0' are in fact configured as such.
ACCUMULO-3153 ACCUMULO-3152
ACCUMULO-3152 fix typo
Merge branch '1.6.1-SNAPSHOT'
ACCUMULO-3152 fix typo
ACCUMULO-3153 ACCUMULO-3152
Merge branch '1.5.3-SNAPSHOT' into 1.6.1-SNAPSHOT

Conflicts:
	assemble/pom.xml
	core/pom.xml
	examples/pom.xml
	examples/simple/pom.xml
	fate/pom.xml
	minicluster/pom.xml
	minicluster/src/main/java/org/apache/accumulo/minicluster/MiniAccumuloCluster.java
	minicluster/src/test/java/org/apache/accumulo/minicluster/MiniAccumuloClusterTest.java
	pom.xml
	proxy/pom.xml
	server/tserver/pom.xml
	start/pom.xml
	test/pom.xml
	trace/pom.xml
ACCUMULO-3048 Fix SCM tag value
Merge remote-tracking branch 'origin/1.5.3-SNAPSHOT' into 1.6.1-SNAPSHOT
Merge remote-tracking branch 'origin/1.6.1-SNAPSHOT' into 1.6.1-SNAPSHOT