build(mail): add .map files to be included in resources IQSS#7424

Without this change, the javamail maps would not be included in the artifact and trigger error messages in the logs about them being missed.

The error message will still be present as long as payara/Payara#6254 is
not fixed, released and we updated to a newer version of Payara.

(cherry picked from commit d650725)

pom.xml

@@ -653,6 +653,7 @@
                     <include>**/firstNames/*.*</include>
                     <include>**/*.xsl</include>
                     <include>**/services/*</include>
+                    <include>**/*.map</include>
                 </includes>
             </resource>
             <resource>