Moves every fixture source file from
spec/javascripts to spec/frontend

EE-specific line changes were introduced in the following MR:
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/12680

This change resolves most of them

DEPRECATION WARNING: The success? predicate is deprecated and will be
removed in Rails 6.0. Please use successful? ...

updated several specs and factories to accomodate new permissions

for f in $(find spec/javascripts/fixtures/ -name '*.rb')
do
  sed -E -e 's/(, ){0,1}(fixture_file_name|
  example\.description)(, ){0,1}//' < $f > $f.tmp; mv $f.tmp $f
done

for f in $(find spec/javascripts/fixtures/ -name '*.rb')
do
  sed 's/do |example|/do/' < $f > $f.tmp; mv $f.tmp $f
done

for f in $(find spec/javascripts/fixtures/ -name '*.rb')
do
  grep -v store_frontend_fixture < $f > $f.tmp; mv $f.tmp $f
done