Add basic support for SLES in params.pp

Going by corosync/pacemaker versions in SLES 12 and 15, I've added
sane-ish defaults.

Bonus points for checking for existence of SLE-HA repositories; checking
if we have a registered HA product should be an optional feature.

manifests/params.pp

@@ -44,6 +44,20 @@
       $package_install_options = undef
     }
 
+    'Suse': {
+      case $facts['os']['name'] {
+        'SLES': {
+          $package_crmsh  = true
+          $package_pcs    = false
+          $package_fence_agents = false
+          $package_install_options = undef
+        }
+        default: {
+          fail("Unsupported flavour of ${facts['os']['family']}: ${facts['os']['name']}")
+        }
+      }
+    }
+
     default: {
       fail("Unsupported operating system: ${facts['os']['name']}")
     }

metadata.json

@@ -31,6 +31,13 @@
       "operatingsystemrelease": [
         "16.04"
       ]
+    },
+    {
+      "operatingsystem": "SLES",
+      "operatingsystemmajrelease": [
+        "12",
+        "15"
+      ]
     }
   ],
   "requirements": [