Fixes #3989 - Change sources to download CFEngine 3.5.2, removed useless patches and adapt patch about OpenVZ
Refs #3989 - Remove unused patches
Refs #3989 - Adapt the patch for openVZ to use the method 'EvalContextHeapAddHard' instead of 'EvalContextClassPutHard'
Merge pull request #134 from nperron/ust_3869/int/3989_adapt_rudder_agent_to_CFE_3.5

Fixes #3989 - Change sources to download CFEngine 3.5.2, removed useless patches and adapt patch about OpenVZ