Update mongodb template to handle KeyValueStore and LockManager

To switch from Redis to MongoDB implementation of the KeyValueStore there is a contribution to add.

  <extension target="org.nuxeo.runtime.kv.KeyValueService" point="configuration">
    <store name="default" class="org.nuxeo.ecm.core.mongodb.kv.MongoDBKeyValueStore">
      <property name="collection">kv</property>
    </store>
  </extension>

This should be part of mongodb template and enable if

nuxeo.keyvalue.provider=mongodb

This should be the default when choosing mongodb template.

Same for the lock manager implementation

nuxeo.lock.manager=mongodb

The lockmanager is by default done with the repository implementation, the important thing is to change `nuxeo.lock.manager` so it is not set to `redis`.