Fix upgrade/downgrade path for deb Ubuntu
Fix upgrade/downgrade path for deb Ubuntu

When switching between 3.2 <> 3.4 <> etc mongo versions, role should ensure that all mongo packages are re-installed.
deb 'mongodb-org' meta package doesn't handle correct versions of dependencies and doesn't update or downgrade other mongo packages.

StackStorm/ansible-st2,armab/ansible-st2