Add logging for the used scm-manager core version

gradle/changelog/scm-core-version-logging.yaml

@@ -0,0 +1,2 @@
+- type: added
+  description: The core version of the SCM-Manager gets logged at the beginning of the application lifecycle

scm-webapp/src/main/java/sonia/scm/lifecycle/BootstrapContextListener.java

@@ -83,6 +83,7 @@ public class BootstrapContextListener extends GuiceServletContextListener {
   protected Injector getInjector() {
     ConfigurationResolver configurationResolver = new ConfigurationResolver();
     configureLoggers();
+    LOG.info("start scm-manager version {}", SCMContext.getContext().getVersion());
     Throwable startupError = SCMContext.getContext().getStartupError();
     if (startupError != null) {
       LOG.error("received unrecoverable error during startup", startupError);