Merge pull request #125 from cdondrup/hydro-devel

Fixed dependencies for scitos_apps_msgs
Renamed ros_datacentre to mongodb_store

This simply bulk replaces all ros_datacentre strings to mongodb_store strings inside files and also in file names.

Needs strands-project/ros_datacentre#76 to me merged first.
Merge pull request #126 from hawesie/hydro-devel

Renamed ros_datacentre to mongodb_store
Renamed datacentre_ rosparams to mongodb_