Rename fixtures directory to job_fixtures to prepare for adding view_fixtures
directory in the following commits.
Change-Id: Ic20997cae020b542ddc22bf444fa6b92fbcae064
Standardize the docstrings as much as possible in the builders module to
provide good working examples to be followed. Remove unnecessary use of
'\' to reduce copy 'n' paste and convert last remaining inline example
to unit test and include inline into docstring.
Change-Id: I02fe217f3a122aaac4d770e638011144236285cb