Updated mylyn tests to handle secure storage dialog on JBDS and be able
to run on both JBT and JBDS

related to:   https://github.com/jboss-reddeer/reddeer/pull/843/files

Ammended commit - to remove references to "October 2014"

Updated jbide-18533 related files per Vlado's suggestions:
https://github.com/jbosstools/jbosstools-integration-tests/pull/713#issuecomment-58400528

Updated to remove comments referencing JBDS and Linux. Moved support
class to org/jboss/tools/mylyn/ui/bot/test per:
https://github.com/jbosstools/jbosstools-integration-tests/pull/713#issuecomment-58500186

Inadvertently missed adding new file:
plugins/org.jboss.tools.mylyn.reddeer/src/org/jboss/tools/mylyn/reddeer/TestSupport.java
to previous commit