[WFCORE-35] Take schema version into account when parsing jvm element.

Also single entry point to JvmXml.java to allow single point for a version switch.
Merge pull request #65 from darranl/WFCORE-33

[WFCORE-33] Correct http-upgrade parsing with respect to 1.x and 2.x schemas.
Merge pull request #66 from darranl/WFCORE-35

[WFCORE-35] Take schema version into account when parsing jvm element.
[WFCORE-26] Created a launcher API to use in tooling or plugins. The API generates the needed list of commands to launch a WildFly process.
[WFCORE-26] Convert the standalone test server to use the launcher API.
[WFCORE-26] Convert domain test runners to use the launcher API.
[WFCORE-22] Portiong version 1.6 of the management schema to WildFly.

Also a change to the default handling within the switch blocks so that the major version can be taken into account. i.e. In the future when we add support for version 1.7 remove the need to identify every location that 1.6 was given special handling.
[WFCORE-41] Update slf4j from 1.7.2.jbossorg-1 to 1.7.7.jbossorg-1
[WFLY-3348] Close the input stream from domain deployment content additions