Adds removed <packaging>eclipse-test-plugin</packaging>

Affects CDI and Archive bot test plugins
Enabled portlets in category.xml
Enabled portlet sources bundle
Replace coretests repo in root pom with integrationtests repo

By accident the repo referenced in our root pom.xml was coretests
instead of integrationtests. Coretests are already referenced in
the parent pom.
Small changes improving stability.
API for importing archetypes and quickstarts added.
Updated runtime tests to support EAP 6.2 GA
Separated test suits for OpenShift Online and OpenShift Enterprise