Default bindings for all UriManager classes; fixed EndToEndTest (issue303042)

[johnfargo]

Reviewers: shindig.remailer_gmail.com, zhoresh,


Please review this at http://codereview.appspot.com/303042/show

Affected files:
  config/container.js
   
java/gadgets/src/main/java/org/apache/shindig/gadgets/DefaultGuiceModule.java
   
java/gadgets/src/main/java/org/apache/shindig/gadgets/rewrite/old/ConcatLinkRewriter.java
   
java/gadgets/src/main/java/org/apache/shindig/gadgets/uri/ConcatUriManager.java
   
java/gadgets/src/main/java/org/apache/shindig/gadgets/uri/DefaultConcatUriManager.java
   
java/gadgets/src/main/java/org/apache/shindig/gadgets/uri/DefaultProxyUriManager.java
  java/gadgets/src/main/java/org/apache/shindig/gadgets/uri/UriModule.java
   
java/gadgets/src/test/java/org/apache/shindig/gadgets/rewrite/old/BaseRewriterTestCase.java
   
java/gadgets/src/test/java/org/apache/shindig/gadgets/rewrite/old/HTMLContentRewriterTest.java
   
java/server/src/test/java/org/apache/shindig/server/endtoend/EndToEndTest.java