Low: asterisk: improve directory creation on start
Low: asterisk: improve directory creation on start

- Wrap the install(8) invocation in ocf_run so we get a useful log
  message on error.
- Exit if we fail to create a required directory.
- Remove superfluous mkdir/chown block.

asp24/resource-agents,asp24/resource-agents,stevenraspudic/resource-agents,stevenraspudic/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents