Move some files in the docker/ directory
Add mongoengine 0.8.7 and getenv 1.1
Add wait_for_mongo_primary.py
Merge branch 't_225_wait_mongo_and_elasticsearch' into develop
Give to elasticsearch hale the memory of the system, and at least 1.5Gb

Conflicts:
	run-elasticsearch.sh
Use oracle-java7
Set the maximum memory to 4Gb