task_create function is added to create a virtual network.
temporary hack: to see if to_hash is handled properly between vnmgr and the models in vdc
The model base class invokes a method of the database_mediator.
Added task_destroy in network.sh
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 branch 'feature-vdcsh-modulesfile' into feature-instance-ha
Added after_create method through model hook.
fix syntax break after merge.
Merge branch 'feature-shared-vol' into feature-instance-ha
Merge pull request #329 from axsh/feature-vdcsh-modulesfile

Pluggable vdc.sh
fix rpm build break from moving functions.sh location.
Merge pull request #330 from axsh/feature-vdcsh-modulesfile

Follow up PR to fix packaging failure of #329
Merge branch 'master' into feature-instance-ha