tests/test-revert-unknown.t

localrepo: only use 'bookmarksinstore' requirement if we have 'store'

This adds check that whether we have the 'store' requirement or not. If we don't
have that, we skip adding the 'bookmarksinstore' requirement and warn user about
it.

Differential Revision: https://phab.mercurial-scm.org/D8771

  $ hg init
  $ touch unknown

  $ touch a
  $ hg add a
  $ hg ci -m "1"

  $ touch b
  $ hg add b
  $ hg ci -m "2"

Should show unknown

  $ hg status
  ? unknown
  $ hg revert -r 0 --all
  removing b

Should show unknown and b removed

  $ hg status
  R b
  ? unknown

Should show a and unknown

  $ ls -A
  .hg
  a
  unknown