Added test case to check for page reload on Page State change

Conflicts:
	errai-navigation/src/test/java/org/jboss/errai/ui/nav/client/local/NavigationTest.java
Fixed ERRAI-793: Page now reloads if page state parameters are changed in the URL.

Conflicts:
	errai-navigation/src/main/java/org/jboss/errai/ui/nav/client/local/Navigation.java
	errai-navigation/src/test/java/org/jboss/errai/ui/nav/client/local/NavigationTest.java