Allow location-dependent values to be set from custom_provision_task_…

…options (#154)

* Adding  methods to core.rb
+ Adding support for service template provisioning tasks in get_vm_and_options
+ Adding method skip_to_state
+ Adding method for managing tags

* Allow location details to be set in custom provision options
+ Set networks, domain, etc in set_custom_provision_task_options
+ Classify this method
+ Use RHC StdLib

* Setting debug to false