Enable @surpressWarnings for Checkstyle

Documentation is a bit ambigous but below changes should enable
@SupressWarnings (in source code) for checkstyle rules
we have some false positives from Checkstyle we want to supress this way
e.g. https://tinyurl.com/4b527vvr lines 258/259; checkstyle forced us
to add those lines, instead I want to supress the warning on this method
using annotation like @supresswraning(checkstyle:missingSwitchDefault))

Issue-ID: CPS-475
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Change-Id: I07f865a279b4951f2ce3240fedcec6b5c46933e0
diff --git a/checkstyle/src/main/resources/onap-checkstyle/onap-java-style.xml b/checkstyle/src/main/resources/onap-checkstyle/onap-java-style.xml
index 4f03bae..b3b4df9 100644
--- a/checkstyle/src/main/resources/onap-checkstyle/onap-java-style.xml
+++ b/checkstyle/src/main/resources/onap-checkstyle/onap-java-style.xml
@@ -54,6 +54,7 @@
             default="checkstyle-suppressions.xml" />
         <property name="optional" value="true" />
     </module>
+    <module name="SuppressWarningsFilter"/>
 
     <!-- Checks for whitespace                               -->
     <!-- See http://checkstyle.org/config_whitespace.html -->
@@ -332,5 +333,6 @@
                 default="checkstyle-xpath-suppressions.xml" />
             <property name="optional" value="true" />
         </module>
+        <module name="SuppressWarningsHolder"/>
     </module>
 </module>