Updated Mylyn/Jenkins tests to include coverage for Jenkins servers that
require user authentication - to handle OpenShift-based Jenkins servers.
Temporarily disable artifacts from experimental nexus in perf plugin

The build of org.jboss.tools.perf.test.core stopped working
because there is a dependency on some artifacts from
https://repository.jboss.org/nexus/content/repositories/jbosstools-experiments/
and this stopped working - Access Denied.
I reported this at https://issues.jboss.org/browse/ORG-2244 .
The consequence is that part of the perf framework functionality
will not work in tests that consume it (CPU/RAM info etc.).
Maven uses reddeer requirements
Revert "Temporarily disable artifacts from experimental nexus in perf plugin"

This reverts commit 687f33aa7d5d85b78be928264f723933810b3435.
https://issues.jboss.org/browse/ORG-2244 is now resolved -
 the jbosstools-experiments nexus repo is public again, so
the dependencies can be downloaded again.
Implemented workaround to Red Deer issue:
https://github.com/jboss-reddeer/reddeer/issues/817
OpenShift tests packages refactoring
Webservices: reimplemented wizards actions with RedDeer

Wizards were reimplemented and moved to appropriate packages in
org.jboss.tools.ws.reddeer plugin.
Webservices: project deletion is forced
Webservices: created new test cases

As-You-Type validation and validation of related jax-rs elements
See JBoss Tools N&N 4.2.0 Beta3
Webservices: Reimplemented DeploymentHelper with RedDeer
Webservices: Reimplemented EclipseCDIExtUtil with RedDeer
Webservices: Using WorkbenchPreferenceDialog to select PreferencePage
Webservices: Refactored (log messages, white spaces, unused imports, etc)
Webservices: More RedDeer - SWTBotEclipseEditor clean up
Webservices: removed QuickFixBot
Webservices: updated/fixed test cases and javadoc
Webservices: removed workaround for EAP 5.1

EAP 5.1 is no longer supported. Tests should focus on EAP 6+ and WildFly.
Webservices: using RedDeer to check content assistant
Webservices: using RedDeer run java application
Webservices: removed SWTBot (also SWTBotExt) and improved to run with RedDeer