vdc.sh: split setup and screen scripts into small parts and allow to run selected daemons listed in Modulesfile.
vdc.sh: allow Modulesfile to set extra arguments.
vdc.sh: start mysql daemon if not running.
vdc.sh: disable SELinux at every start up time.
vdc.sh: add generic hva module.
vdc.sh: move common library file.
vdc.sh: add new mandate varible: amqp_server_uri
vdc.sh: add default Modulesfile.
Merge pull request #329 from axsh/feature-vdcsh-modulesfile

Pluggable vdc.sh