update onboarding spring

as requested for security purposes upgrading spring to 4.3.15.RELEASE

Change-Id: Ia2fd120860384291a38272bea5331467a395984f
Issue-ID: SDC-1323
Signed-off-by: Michael Lando <ml636r@att.com>
diff --git a/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-websocket/pom.xml b/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-websocket/pom.xml
index abff87f..5a7012d 100644
--- a/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-websocket/pom.xml
+++ b/openecomp-be/lib/openecomp-sdc-notification-lib/openecomp-sdc-notification-websocket/pom.xml
@@ -22,7 +22,7 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-websocket</artifactId>
-            <version>4.3.4.RELEASE</version>
+            <version>${spring.framework.version}</version>
         </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>