Removed hard set requirements

This change removes the hard set requirements which cause conflicts
with the ansible-lxc-rpc repo. Because the packages are locked
down independently in the ansible-lxc-rpc these package entries
have a high probability of creating a conflict. Any version
of the monitoring repo can be deployed with any version the
ansible-lxc-rpc which results in conflict as the newest version of
the package will always be installed.

(cherry picked from commit 69ad10da84288a690c4d8bfd251c7a430135d013)
Merge pull request #129 from claco/issue-126-backport-icehouse

Removed hard set requirements