WELD-2833 Weld#addExtensions should not swallow exception when the extension cannot be instantiated

Author: manovotn

environments/se/core/src/main/java/org/jboss/weld/environment/se/Weld.java

@@ -480,7 +480,7 @@ public Weld addExtensions(Class<? extends Extension>... extensionClasses) {
                 Extension extension = SecurityActions.newInstance(extensionClass);
                 addExtension(extension);
             } catch (Exception ex) {
-                CommonLogger.LOG.unableToInstantiate(extensionClass, new Object[] {}, ex);
+                throw CommonLogger.LOG.unableToInstantiate(extensionClass, new Object[] {}, ex);
             }
         }
         return this;