[JBIDE-15744]: Added support for List<IEnvironmentVariable> to IApplication interface, as well as other side-effect changes.

The source changes are associated with JBIDE-15744.
The public interface method changes for IApplication are listed below:
1) public List<IEnvironmentVariable> getEnvironmentVariables()
2) public List<IEnvironmentVarable> getEnvironmentVaraiblesList()
3) public Map<String,IEnvironmentVariable> getEnvironmentVariableMap()

Change 1 made sense because we don't actually do any work on the list that is returned, and really just require a glob of information.  Further support for this change will need to be made within jbosstools-openshift to reference the references List<IEnvironmentVariable> which are required.  This work should be submitted with the changes in JBIDE-15766 as seen here: https://issues.jboss.org/browse/JBIDE-15766