Allow configuration of SSL for MongoDB.
Allow configuration of SSL for MongoDB.

Client side SSL certs can now be configured by setting a combination of:

MONGO_SSL_CA='/path/to/ca.pem'
MONGO_SSL_CERT='/path/to/cert.pem'
MONGO_URI='mongodb://CN=user01@node01,node02/monitoring?replicaSet=monitoring&authMechanism=MONGODB-X509'

guardian/alerta,guardian/alerta,guardian/alerta,guardian/alerta