Fixed some security issues found after running FindBugs security scan.

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/push/notification/NotificationContext.java

@@ -48,6 +48,10 @@ public class NotificationContext {
         return properties;
     }
 
+    public void setProperties(Map<String, String> propertiesMap) {
+        properties = propertiesMap;
+    }
+
     public Operation getOperation() {
         return operation;
     }

components/webapp-authenticator-framework/org.wso2.carbon.webapp.authenticator.framework/src/main/java/org/wso2/carbon/webapp/authenticator/framework/authenticator/JWTAuthenticator.java

@@ -90,6 +90,9 @@ public class JWTAuthenticator implements WebappAuthenticator {
         if (requestUri == null || "".equals(requestUri)) {
             authenticationInfo.setStatus(Status.CONTINUE);
         }
+        if (requestUri == null) {
+            requestUri = "";
+        }
         StringTokenizer tokenizer = new StringTokenizer(requestUri, "/");
         String context = tokenizer.nextToken();
         if (context == null || "".equals(context)) {