Add support for 2 more Gdata operations, two test cases created to test gdata serviceBinding and referenceBinding

Update in this patch:

1. Support 5 GData operations for both servicebidng and
referencebinding (getFeed, getEntry, post, put, delete) ---[tested]

2. Add a test case for the testing of these operations in
Localhost (test both serviceBinding and referenceBinding)----[tested]

3. Add a test case for the testing of these operations consuming
Google Blog service (test referenceBinding) ----[tested]

4. Update dependencies in pom.xml for a clean mvn build — [not tested]

5. Add "serviceType", "username" and "password" into gdata
binding definition to support GData authorization — [tested]