Fix major sonar issues in ccsdk/sli/core module
https://sonar.onap.org/component_issues?id=org.onap.ccsdk.sli.core%3Accsdk-sli-core#resolved=false|severities=MAJOR|rules=squid%3AS1161
Add the "@Override" annotation above this method signature.
Issue-Id:CCSDK-67
Change-Id: Ie074574c7bbd2ca394d116e73aa6aab47ad5b8de
Signed-off-by: shashikanth.vh <shashikanth.vh@huawei.com>
                        return 0;
                }
 
+                @Override
                public boolean equals(Object object) {
                        if (this == object) {
                                return true;
                        return true;
                }
 
+                @Override
                public int hashCode() {
                        int result = super.hashCode();
                        result = 31 * result + (child_elements != null ? child_elements.hashCode() : 0);