Clean the test path after each spec run
Clean the test path after each spec run

FactoryBot's build_stubbed ignores the current database sequence of the
projects table and starts at ID 1000. If more than 1000 projects are created
during a test run, leftover repositories can cause spec failures. For example,
a spec that expects an empty repository may fail since there may be existing
content.

Closes #5461

axilleas/gitlabhq,jirutka/gitlabhq,stoplightio/gitlabhq,iiet/iiet-git,iiet/iiet-git,axilleas/gitlabhq,stoplightio/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,dreampet/gitlab,jirutka/gitlabhq,iiet/iiet-git,stoplightio/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,jirutka/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq