Change packages from com.hpcloud.mon to monasca.api
Rename service from mon-api to monasca-api. Move config file
to /etc/monasca, jar to /opt/monasca
Renamed files from mon- to monasca-
Use the monasca group. Required so API can write to
/var/log/monasca and read config file in /etc/monasca
Change user from mon_api to monasca_api
Change-Id: Idaefe138629595507f3d38a533381408cc6f32e3