Fix discrepencies between MQR and severity for CFamily rules

rules/S6936/cfamily/metadata.json

@@ -3,9 +3,9 @@
   "type": "CODE_SMELL",
   "code": {
     "impacts": {
-      "MAINTAINABILITY": "MEDIUM"
+      "MAINTAINABILITY": "BLOCKER"
     },
-    "attribute": "CONVENTIONAL"
+    "attribute": "CLEAR"
   },
   "status": "ready",
   "remediation": {

rules/S6996/cfamily/metadata.json

@@ -9,7 +9,7 @@
   "tags": [
     "since-c++11"
   ],
-  "defaultSeverity": "Major",
+  "defaultSeverity": "Minor",
   "ruleSpecification": "RSPEC-6996",
   "sqKey": "S6996",
   "scope": "All",

rules/S7032/cfamily/metadata.json

@@ -17,7 +17,7 @@
   "quickfix": "infeasible",
   "code": {
     "impacts": {
-      "MAINTAINABILITY": "HIGH"
+      "MAINTAINABILITY": "MEDIUM"
     },
     "attribute": "CLEAR"
   }

rules/S7040/cfamily/metadata.json

@@ -10,7 +10,7 @@
     "since-c++23",
     "bad-practice"
   ],
-  "defaultSeverity": "Minor",
+  "defaultSeverity": "Major",
   "ruleSpecification": "RSPEC-7040",
   "sqKey": "S7040",
   "scope": "All",

rules/S7127/cfamily/metadata.json

@@ -8,7 +8,7 @@
   },
   "tags": [
   ],
-  "defaultSeverity": "Minor",
+  "defaultSeverity": "Major",
   "ruleSpecification": "RSPEC-7127",
   "sqKey": "S7127",
   "scope": "All",
@@ -18,6 +18,6 @@
     "impacts": {
       "MAINTAINABILITY": "MEDIUM"
     },
-    "attribute": "CONVENTIONAL"
+    "attribute": "CLEAR"
   }
 }