util_test.libguestfs: Support choosing disk or domain in VirtTools.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
libguestfs.tests: Supplements for guestmount test.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
virttest: Add disable for warning color

Warning color is added but missed in disable. This will cause trouble
when pipe stdout into file.

Signed-off-by: Hao Liu <hliu@redhat.com>
autotest regression test: default to master branch

Since the next branch does not exist anymore.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
autotest regression test: fetch the installer script from the chosen branch

If using the github repo URL. If not, default to the script on the github
master branch.

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Merge pull request #1191 from Hao-Liu/fix_warn_color

virttest: Add disable for warning color
virt: Fix hanging tail_threads which are created by recreating env.

Signed-off-by: Jiří Župka <jzupka@redhat.com>
Merge pull request #1157 from yumingfei/enhance_guestmount

Libguestfs: supplements of guestmount test.
Merge pull request #1195 from clebergnu/autotest_regression_branch

Autotest regression test
Merge pull request #1197 from jzupka/fix_tail_threads

virt: Fix hanging tail_threads which are created by recreating env.