SYS-1936 add zfs-auto-snap auto killer

Hack until we fix the real issue - kill any hourly snapshot process that
has been running for over 15 minutes.

files/snaphourlykiller

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+export PATH=/usr/local/sbin:/usr/sbin:/usr/local/bin:/usr/bin
+
+for pid in $(pgrep -f zfs-auto-snapshot); do
+    if pargs $pid | grep auto-snapshot:hourly > /dev/null ; then
+        echo Killing stale hourly snapshot process: $pid
+        ptree $pid
+        kill $pid
+    fi
+done

manifests/client.pp

@@ -87,6 +87,21 @@
     require => File['/usr/local/sbin'],
   }
 
+  file { '/usr/local/sbin/snaphourlykiller':
+    ensure  => 'present',
+    source  => 'puppet:///modules/zfsautosnap/snaphourlykiller',
+    owner   => 'root',
+    group   => 'sys',
+    mode    => '0755',
+    require => File['/usr/local/sbin'],
+  } ->
+  cron {'snaphourlykiller':
+    ensure  => 'present',
+    command => '/usr/local/sbin/snaphourlykiller',
+    user    => 'root',
+    minute  => 15,
+  }
+
   svcprop { 'zfssnap daily type':
     fmri     => "${basefmri}:daily",
     property => 'zfs/backup',