Add recommendation support to Cloudera plugin
Add recommendation support to Cloudera plugin

Added support of recommendations to both versions of Cloudera
plugin. Also added small refactoring in AutoConfigsProvider.

Partial-Implements blueprint: recommend-configuration

Change-Id: I25f906d830b803b65ffcc7443978ea3cfef126da

openstack/sahara-tests,esikachev/sahara-tests,openstack/sahara-scenario,openstack/sahara-scenario,esikachev/sahara-tests,openstack/sahara-tests,openstack/sahara-scenario,openstack/sahara-tests,openstack/sahara-tests,esikachev/sahara-tests