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Apache Curator 3.0.0，ZooKeeper客户端简化

Apache Curator 3.0.0 发布，该版本带来的对 ZooKeeper 的新的动态配置 APIs 的兼容，更新内容如下：

子任务

[ CURATOR-160 ] - Support Dynamic Reconfig
[ CURATOR-161 ] - Support Watcher Removal
[ CURATOR-162 ] - Support Local Sessions
[ CURATOR-214 ] - Support new create() APIs
[ CURATOR-215 ] - Support async multi/transaction APIs
[ CURATOR-217 ] - Use new Watcher Removal APIs in Curator Recipes
[ CURATOR-247 ] - Extend Curator's connection state to support SESSION_LOST
[ CURATOR-248 ] - Introduce pluggable error handlers
[ CURATOR-249 ] - Update all Curator recipes to use new pluggable Error Handler
[ CURATOR-253 ] - Use new injectSessionExpiration() in the test module
[ CURATOR-265 ] - Dynamic Reconfig APIs needs some work and more accurate testing
[ CURATOR-266 ] - Support updateServerList

Bug

[ CURATOR-258 ] - PersistentEphemeralNode stops watching after first WatchedEvent
[ CURATOR-260 ] - Fix tests in CURATOR-3.0
[ CURATOR-268 ] - Curator client doesn't behave well when it loses connection: CRUD operation fail

提升

[ CURATOR-159 ] - Parent Task for ZooKeeper 3.5.0 support
[ CURATOR-186 ] - Port Curator to Jackson FasterXML library from Jackson Codehaus library
[ CURATOR-257 ] - Thread.sleep in TestingZooKeeperMain.blockUntilStarted is costly for unit tests
[ CURATOR-261 ] - ZooKeeper 3.5.x has enough APIs so that Javassist can be removed