[COMMON] Add limits to mongo statefulsets.

Having limits is important in order to have safe deployment.
mongo didn't had one so let's add them.

Issue-ID: OOM-2230
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I4791b924693e4e1eaac14077d4f30e3d29228779
2 files changed