Changes to use monasca instead of mon

Changed to use monasca_api instead of mon_api. Added monasca_api
user to group monasca so the api can write to /var/log/monasca and
read the config file in /etc/monasca

Change data bag names to monasca_api instead of mon_api

Place jar file in /opt/monasca

Change service name from mon-api to monasca-api

Change-Id: Ic2a8db0b6b1451872f42373077cf5f2911de3652