bundle: do no check the changegroup version if no changegroup is included
We don't need to check the compatibility of something we will not use.
In practice this was getting in the was of `streamv2` bundles on a narrow
repository as the 'cg.version=02' value was rejected by this checks.
Tests that the exit code is as expected when ui.detailed-exit-code is *not*
enabled.
$ cat >> $HGRCPATH << EOF
> [ui]
> detailed-exit-code=no
> EOF
$ hg init repo
$ cd repo
$ echo a > a
Expect exit code 0 on success
$ hg ci -Aqm initial
$ hg co nonexistent
abort: unknown revision 'nonexistent'
[255]
$ hg co 'none()'
abort: empty revision set
[255]
$ hg co 'invalid('
hg: parse error at 8: not a prefix: end
(invalid(
^ here)
[255]
$ hg co 'invalid('
hg: parse error at 8: not a prefix: end
(invalid(
^ here)
[255]
$ hg continue
abort: no operation in progress
[255]
$ hg st --config a=b
abort: malformed --config option: 'a=b' (use --config section.name=value)
[255]
$ echo b > a
$ hg ci -m second
$ echo c > a
$ hg ci -m third
$ hg --config extensions.rebase= rebase -r . -d 0 -q
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')
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