adjust depended asset position or throw exception on conflict

removed test param 'appClass' as it does not make sense to configure
application class for all tests, some explicitly need webapp where
some might explicitly need console app.

issue #303
Here is the proposal for RESTful routing syntax:
https://gist.github.com/cebe/5674918

- Better names
- Removed not used MySQLTestCase
- Moved base testcase for DB to db namespace
- Minor style fixes

- better throw http exception on not satisfiable range request
- constitent header names
- fixed range end when range request is to the end
- added unit test

related to #275, fixes #148