Added ability to check return code using cmd.run_all in rabbitmq module
Changed rabbitmq module to check retcode from enable/disable plugin
Merge remote-tracking branch 'upstream/develop' into develop
Merge branch 'develop' of github.com:saltstack/salt into develop
Added new features for virtual/swap memory stats.

Added ps.virtual_memory and ps.swap_memory to replace the following
deprecated functions:

 - psutil.phymem_usage()
 - psutil.virtmem_usage()
 - psutil.cached_phymem()
 - psutil.phymem_buffers()
 - psutil.avail_phymem()
 - psutil.used_phymem()
 - psutil.total_virtmem()
 - psutil.avail_virtmem()
 - psutil.used_virtmem()
Updated get_boot_time function.

Change psutil.BOOT_TIME to psutil.get_boot_time() as the
former is deprecated.  Output remains unchanged.
Updated network io counter function.

Change psutil.network_io_counters() to psutil.net_io_counters()
as the former is deprecated.  Output remains unchanged.
Added unit tests for new psutil features.
Added deprecation docstrings and warnings to ps module.
Merge pull request #10106 from tedski/9301

Replacing deprecated functions in ps execution module.