chore(supported-environments): update supp envs.

related to CAM-1683
improve(migration-guide): Add patch level upgrade

related to #CAM-1720

- remove chapter Migrate your Process Application
improve(enterprise): Provide wls12 distro

related to #CAM-1679

download location must be added with 7.1-alpha2 release
fix(intall/jboss): markdown error
fix(docs): 'app:' in external task form examples
fix(vanilla-jboss): correct artifact identifier
doc(install-guide): add shared process engine install guide

related to #CAM-1680
Merge branch 'origin/master'
doc(install-guide): clarify shared libs install location

related to #CAM-1680