poolcounter.pp: retab/puppet lint fix

* tabs to four spaces
* puppet-lint
* Code change: replaced trailing semicolon by commas

Change-Id: Ie596893a89cf0eeda9371d08799c1644926cd0ef
poolcounter: monitor TCP port 7531 replies

We had a poolcounter outage that went unnoticed because we only monitor
the process is running but do not verify the TCP port is actually
reacheable.

Port found by looking at the C daemon source code:

 $ cd mediawiki/extensions/PoolCounter
 $ git grep PORT
 daemon/client_data.h:#define PORT 7531
 daemon/main.c:          listener = listensocket( PORT );
 $

Change-Id: Ie6c67a43c1ad7f3d1cf2b8811dc3c4a765eaab9f
Merge "poolcounter.pp: retab/puppet lint fix" into production
Merge "poolcounter: monitor TCP port 7531 replies" into production