Removing all restlet stuff from code (#1833)

* Remove all classes that have no reference anywhere.

* Moved some tests to resources

* checkpoint

* Removed tests that test extractParams() functionality. We don't use it anymore

* More changes to delete stuff

Only test deleted so far is LLCSegmentCommit unit test.

* Removed classes via safedelete

* More deletions, and removed unused methods and imports

* Removed a comment

* Port test to not use restlet

* Remove restlet from pomfiles

* Addressed comments from @antumbde

Had to remove one annotation in pojos/Instance.java to get things to compile.

NOTICE

@@ -16,10 +16,6 @@ This product includes software developed at
 jline (http://jline.sourceforge.net/).
 Licensed under the BSD License.
 
-This product includes software developed at
-restlet (http://www.restlet.org/about/legal).
-Licensed under the Apache License 2.0.
-
 This product includes software developed at
 Google (http://www.google.com/).
 Licensed under the Apache License 2.0.

pinot-common/pom.xml

@@ -148,10 +148,6 @@
       <groupId>org.webjars</groupId>
       <artifactId>swagger-ui</artifactId>
     </dependency>
-    <dependency>
-      <groupId>org.restlet.jse</groupId>
-      <artifactId>org.restlet</artifactId>
-    </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-annotations</artifactId>