Resolve httpd module imports errors for python2.7
Rename start_jedi.jedi to start_jedi.company in all tests.
Replace json.dump with own function in eldoc fixtures.

Keyword arguments change in python 2x and 3x. This make
eldoc tests fail on different python versions.
Fix jedi_location test for python 2x version.

Those python version doesn't has fixture definition in python code.
Only C sources.