tests: conditionalize tests for various repo features
Working my down the long tail of test failures due to the simple
store.
We're now down to 38 failures with the simple store.
Differential Revision: https://phab.mercurial-scm.org/D3096
#require test-repo jshint hg10
$ . "$TESTDIR/helpers-testrepo.sh"
run jshint on all tracked files ending in .js except vendored dependencies
$ cd "`dirname "$TESTDIR"`"
$ testrepohg locate 'set:**.js' \
> 2>/dev/null \
> | xargs jshint