Fix bug when `package_ensure` was set to `absent`.

* Service[memcached] `enable` was left to `true`
Releax the Puppet Enterprise requirement

The saz/memcahed module will not be installed for PE versions
other than 3.2.x. This change relaxes the required version to
install for either the 3.2.x or 3.3.x series.

Full compatibility on Puppet Forge will require a new module
release
Merge pull request #43 from ccin2p3/fix-ensure-absent

Fix bug when `package_ensure` was set to `absent`.
Merge pull request #44 from hogepodge/relax_pe_requirement

Releax the Puppet Enterprise requirement