Added Gradle back for Mend scans

Signed-off-by: John Rofrano <[email protected]>

Author: rofrano

.devcontainer/Dockerfile

@@ -31,4 +31,6 @@ RUN curl -s "https://get.sdkman.io" | bash
 SHELL ["/bin/bash", "-c"]    
 RUN source "$HOME/.sdkman/bin/sdkman-init.sh" && \
     sdk install java 17.0.12-sem && \
-    sdk use java 17.0.12-sem
+    sdk use java 17.0.12-sem && \
+    sdk install gradle
+