Fix missing comma in metadata.json

metadata.json

@@ -12,55 +12,55 @@
         "operatingsystemrelease": [
           "5",
           "6"
-        ],
+        ]
       },
       {
         "operatingsystem": "CentOS",
         "operatingsystemrelease": [
           "5",
           "6"
-        ],
+        ]
       },
       {
         "operatingsystem": "OracleLinux",
         "operatingsystemrelease": [
           "5",
           "6"
-        ],
+        ]
       },
       {
         "operatingsystem": "Scientific",
         "operatingsystemrelease": [
           "5",
           "6"
-        ],
+        ]
       },
       {
         "operatingsystem": "SLES",
         "operatingsystemrelease": [
           "11 SP1"
-        ],
+        ]
       },
       {
         "operatingsystem": "Debian",
         "operatingsystemrelease": [
           "6",
           "7"
-        ],
+        ]
       },
       {
         "operatingsystem": "Ubuntu",
         "operatingsystemrelease": [
           "10.04",
-          "12.04",
-        ],
+          "12.04"
+        ]
       },
       {
         "operatingsystem": "Solaris",
         "operatingsystemrelease": [
           "10"
-        ],
-      }
+        ]
+      },
       {
         "operatingsystem": "Windows",
         "operatingsystemrelease": [
@@ -69,12 +69,12 @@
           "Server 2012",
           "Server 2012 R2",
           "7"
-        ],
+        ]
       }
     ],
     "requirements": [
       { "name": "pe", "version_requirement": "3.2.x" },
-      { "name": "puppet", "version_requirement": "3.x" },
+      { "name": "puppet", "version_requirement": "3.x" }
     ],
     "dependencies": []
 }