Synchronize calls to ComponentResolver createComponent (TORQUE-656)

Without this synchronize multiple threads were attempting to
initialize components (specifically RackApplicationComponent) in a
single runtime thus leading to errors such as "undefined method
`to_app' for #<Rack::Builder:0x21aa4aaf>" and "uninitialized constant
Rack" when multiple requests come in to a previously unitialized Rack
runtime.

modules/core/src/main/java/org/torquebox/core/component/ComponentResolver.java

@@ -62,7 +62,7 @@ public RubyComponent resolve(final Ruby runtime) throws Exception {
         return wrapComponent( rubyComponent );
     }
 
-    protected IRubyObject createComponent(final Ruby runtime) throws Exception {
+    protected synchronized IRubyObject createComponent(final Ruby runtime) throws Exception {
         prepareInjections(runtime);
         IRubyObject rubyComponent = this.componentInstantiator.newInstance( runtime, this.initializeParams );
         return rubyComponent;