Create smoke test that installs Devstudio from installer jar and then all the Central/EarlyAccess stuff on top

We need to create jenkins job which can be used as smoke test for Devstudio installed from installer jar [0], on all three supported OS platforms (RHEL7/Fedora24, Win10, MacOS 10).

This job should be configurable, we want to be able to pass in a different parameters as URLs and then use the same job to test both snapshot and staging.

The job should:

1. Install devstudio from installer jar
2. Clean and start eclipse in strict mode and in clean work space
3. Install all stuff from Red Hat Central using graphical interface
   • Install everything at once - this is the fastest approach but also makes diagnosing errors more difficult.
   • So, when problems occur, could re-run the job (manually or with naginator plugin?) using parameter connectorIDsToInstall = "net.sourceforge.pmd.eclipse" for example
4. Restart Eclipse
5. Check for errors
6. Should also test if some software from Central works - run quickstarts or wizards

Possible configuration parameters:

• installer jar URL (snapshot/staging/stable) [0]
• jboss.discovery.directory.url, jboss.discovery.site.integration-stack.url or something similar (eg., https://devstudio.redhat.com/10.0/snapshots/builds/jbosstools-discovery.earlyaccess_master/latest/all/repo or https://devstudio.redhat.com/10.0/staging/updates/discovery.earlyaccess/10.4.0.AM1/ or https://devstudio.redhat.com/10.0/stable/updates/discovery.earlyaccess/)
• ERROR_PATTERN (like rpm_rh_central_test has)
• TESTS_FORK = jbosstools ?
• TEST_BRANCH = master or jbosstools-4.4.x or jbosstools-4.4.4.x ?
• connectorIDsToInstall = "" (install everything found) or specific value [1] for re-running if something fails

[0] https://devstudio.jboss.com/10.0/staging/builds/devstudio-10.3.0.GA-build-product/latest/all/ or https://devstudio.jboss.com/10.0/snapshots/builds/devstudio.rpm_10.0.neon/latest/x86_64/ or https://devstudio.jboss.com/static/10.0/stable/builds/devstudio-10.3.0.GA-build-product/latest/all/
[1] https://github.com/jbosstools/jbosstools-discovery/blob/master/jbdevstudio/com.jboss.jbds.central.discovery/plugin.xml#L526