Partial refactoring of the EntityServletTestHelper to repeat less code.
Finished up changes to entity servlet test helper.
Another chunk of refactoring.
Finished up refactor of non-entity servlet helper.
Fix up too-specific exception handling of affected tests
+ Rename misspelled method
Fixing up mistakes made in refactoring.
+ Changing the expected exceptions in some tests to match refactored exceptions
+ Removed now redundant Servlet Exception class
Merge pull request #698 from kaysoky/ServletRefactor

Servlet Test Refactor