tests/mockblackbox.py

commands: execute checkunfinished and bailifchanged inside wlock scope

Before this patch, "hg import" executes below before acquisition of
wlock:

  - cmdutil.checkunfinished()
  - cmdutil.bailifchanged()

It may cause unintentional result, if another command runs parallelly
(see also issue4368).

To avoid this issue, this patch executes 'cmdutil.checkunfinished()'
and 'cmdutil.bailifchanged()' inside wlock scope of "hg import".

from mercurial import util

def makedate():
    return 0, 0
def getuser():
    return 'bob'

# mock the date and user apis so the output is always the same
def uisetup(ui):
    util.makedate = makedate
    util.getuser = getuser