Fix various FindBugs warnings.

Matthew Swift

21.14.2013 be568465d0063d55f558fb20056044280a3bc5cc

 opendj-sdk/opendj3/opendj-rest2ldap/src/main/java/org/forgerock/opendj/rest2ldap/Rest2LDAP.java

@@ -708,7 +708,7 @@
        private AttributeNameStrategy(final AttributeType dnAttribute,
                final AttributeDescription idAttribute, final boolean isServerProvided) {
            this.dnAttribute = AttributeDescription.create(dnAttribute);
            if (dnAttribute.equals(idAttribute)) {
            if (this.dnAttribute.equals(idAttribute)) {
                throw new IllegalArgumentException("DN and ID attributes must be different");
            }
            this.idAttribute = ensureNotNull(idAttribute);