8325189: Enable this-escape javac warning in java.base

Reviewed-by: alanb, erikj, naoto, smarks, ihse, joehw, lancea, weijun

src/java.base/share/classes/java/util/InvalidPropertiesFormatException.java

@@ -55,6 +55,7 @@ public class InvalidPropertiesFormatException extends IOException {
      * @param  cause the cause (which is saved for later retrieval by the
      *         {@link Throwable#getCause()} method).
      */
+    @SuppressWarnings("this-escape")
     public InvalidPropertiesFormatException(Throwable cause) {
         super(cause==null ? null : cause.toString());
         this.initCause(cause);