Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2019-05-21' into...

- qtest patches to get rid of the global_qtest variable in more tests
- some iotests patches that have multiple reviews and thus are ready to go

# gpg: Signature made Tue 21 May 2019 11:40:31 BST
# gpg:                using RSA key 2ED9D774FE702DB5
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* remotes/huth-gitlab/tags/pull-request-2019-05-21:
  tests/qemu-iotests: Remove the "_supported_os Linux" line from many tests
  cirrus / travis: Add gnu-sed and bash for macOS and FreeBSD
  tests/qemu-iotests: Do not hard-code the path to bash
  tests/qemu-iotests/check: Pick a default machine if necessary
  tests/qemu-iotests/005: Add a sanity check for large sparse file support
  tests/hd-geo-test: Use qtest_init() instead of qtest_start()
  tests/device-introspect: Use qtest_init() instead of qtest_start()
  tests/qom-test: Use qtest_init() instead of qtest_start()
  tests/numa-test: Use qtest_init() instead of qtest_start()
  tests/q35-test: Make test independent of global_qtest
  tests/libqos: Get rid of global_qtest dependency in qvring_init()
  tests/libqtest: Fix description of qtest_vinitf() and qtest_initf()
  tests/libqtest: Remove unused global_qtest-related wrapper functions

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>