devel: activate default-date in tests

It will make writing future tests more easier for everyone as we won't need to
glob dates anymore in tests.

tests/run-tests.py

@@ -956,6 +956,7 b' class Test(unittest.TestCase):'
         hgrc.write(b'tag = -d "0 0"\n')
         hgrc.write(b'[devel]\n')
         hgrc.write(b'all-warnings = true\n')
+        hgrc.write(b'default-date = 0 0\n')
         hgrc.write(b'[largefiles]\n')
         hgrc.write(b'usercache = %s\n' %
                    (os.path.join(self._testtmp, b'.cache/largefiles')))

tests/test-basic.t

@@ -6,6 +6,7 b' Create a repository:'
   defaults.shelve=--date "0 0"
   defaults.tag=-d "0 0"
   devel.all-warnings=true
+  devel.default-date=0 0
   largefiles.usercache=$TESTTMP/.cache/largefiles (glob)
   ui.slash=True
   ui.interactive=False

tests/test-commandserver.t

@@ -192,6 +192,7 b' check that local configs for the cached '
   defaults.shelve=--date "0 0"
   defaults.tag=-d "0 0"
   devel.all-warnings=true
+  devel.default-date=0 0
   largefiles.usercache=$TESTTMP/.cache/largefiles
   ui.slash=True
   ui.interactive=False

tests/test-commit.t

@@ -120,7 +120,7 b' commit added file that has been deleted'
 An empty date was interpreted as epoch origin
 
   $ echo foo >> foo
-  $ hg commit -d '' -m commit-no-date
+  $ hg commit -d '' -m commit-no-date --config devel.default-date=
   $ hg tip --template '{date|isodate}\n' | grep '1970'
   [1]