* fix issue #2258

* fix #2097 #1947

* remove Description and date tag

* split the diferent version to different plugins

* resolve conflict

* record all ips on multiple host mode of mysqlconnector-5x

* fix jdk 6.x

* optimise the code

* optimise code

* modify class name

* fix #2097 #1947

* i do not think it is a good idea to move the Instrumentation to mysql-common,the better way is extract a public method to return the InteceptorPionts in mysql-common

* fix #2097 #1947

* remove witnessClasses of subclasses

* [maven-release-plugin] prepare release v6.0.0-GA

* [maven-release-plugin] prepare for next development iteration

* Lock oracle and resin plugins version.

* Move resin and oracle plugin to openskywalking

* Restore submodule active.

* Add another submodule active command.

* Remove the wrong test cases in release and fix some doc issues.

* [maven-release-plugin] prepare release v6.0.0-alpha

* [maven-release-plugin] prepare for next development iteration

* Fix some doc

* Moves to Maven wrapper to stabilize the version in use

This will ensure those building will have similar experience due to
having a fixed maven version.

* Updates most plugin versions and removes redundant configuration

* Sets up build enforcement for JDK 1.8 until further work occurs

* Change version 

* [maven-release-plugin] prepare release apm-5.0.0-alpha

* [maven-release-plugin] prepare for next development iteration

Fix assmbly for mvn clean install -Papache-release and update version to SNAPSHOT for SNAPSHOT release.

2.Release the prototype of ‘TraceSegment’.