[SPEC] Added missing body object in snapshot apis

rest-api-spec/api/snapshot.create.json

@@ -27,7 +27,9 @@
         }
       }
     },
+    "body" : {
       "description" : "The snapshot definition",
       "required" : false
+    }
   }
 }

rest-api-spec/api/snapshot.create_repository.json

@@ -22,7 +22,9 @@
         }
       }
     },
+    "body": {
       "description" : "The repository definition",
       "required" : true
+    }
   }
 }

rest-api-spec/api/snapshot.restore.json

@@ -27,7 +27,9 @@
         }
       }
     },
+    "body" : {
       "description" : "Details of what to restore",
       "required" : false
+    }
   }
 }