Minor warnings removal wrt lgtm.com

Author: cowtowncoder

src/main/java/com/fasterxml/classmate/types/ResolvedRecursiveType.java

@@ -165,4 +165,9 @@ public StringBuilder appendFullDescription(StringBuilder sb)
         }
         return _referencedType.equals(other._referencedType);
     }
+
+    // Only for compliance purposes: lgtm.com complains if only equals overridden
+    @Override public int hashCode() {
+        return super.hashCode();
+    }
 }

src/main/java/com/fasterxml/classmate/types/TypePlaceHolder.java

@@ -106,4 +106,9 @@ public StringBuilder appendFullDescription(StringBuilder sb) {
         // should these ever match actually?
         return (o == this);
     }
+
+    // Only for compliance purposes: lgtm.com complains if only equals overridden
+    @Override public int hashCode() {
+        return _ordinal;
+    }
 }