Change email address regex to support + character

features/claim-mgt/org.wso2.carbon.claim.mgt.server.feature/resources/conf/claim-config.xml

@@ -67,7 +67,7 @@
 				<Required />
 				<DisplayOrder>6</DisplayOrder>
 				<SupportedByDefault />
-                <RegEx>^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$</RegEx>
+                <RegEx>^([a-zA-Z0-9_\+\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,10})+$</RegEx>
 			</Claim>
 			<Claim>
 				<ClaimURI>http://wso2.org/claims/telephone</ClaimURI>