Add texmode testsuite for ext3,xfs and btrfs

[jknphy]

• Related ticket: https://progress.opensuse.org/issues/30433
• Parameters to be configured for new test suites:
  `DESKTOP=textmode FILESYSTEM=ext4 FILESYSTEM=ext3 or FILESYSTEM=xfs or FILESYSTEM=btrfs VIDEOMODE=text and TEST=ext4 or TEST=ext3 or TEST=xfs or TEST=btrfs
• Verification runs:
  • opensuse-Tumbleweed-DVD-x86_64-Build20180602-ext4_textmode@64bit
  • opensuse-Tumbleweed-DVD-x86_64-Build20180602-btrfs@64bit
  • opensuse-Tumbleweed-DVD-x86_64-Build20180602-ext3@64bit
  • opensuse-Tumbleweed-DVD-x86_64-Build20180602-xfs@64bit
  • opensuse-15.0-DVD-x86_64-Build267.2-ext4_textmode@64bit
  • opensuse-Tumbleweed-DVD-ppc64le-Build20180530-ext4@ppc64le NOT YET

[SergioAtSUSE]

I think you should make it clearer in the comment that FILESYSTEM=ext3, FILESYSTEM=xfs, FILESYSTEM=btrfs. And, it should be better if we test ext4 instead of ext3.

[SergioAtSUSE]

LGTM

[jknphy]

ext4 is already tested for TW.

[SergioAtSUSE]

Not on textmode installation: https://openqa.opensuse.org/tests/686325#step/welcome/1

[jknphy]

All verification provided except for ppc. My openQA version is too updated comparing with the one in the ppc worker. Could you please @SergioAtSUSE run it for me? With that I think we have reached good test coverage. I used to clone it:
clone_job.pl --skip-chained-deps --from https://openqa.opensuse.org 685123 FILESYSTEM=ext4 TEST=ext4 INSTALLONLY=1

[SergioAtSUSE]

I also have problems creating a verification run.
Since this PR only contains new needles and cannot break anything, I am merging it.

Please, create a new PR with ppc64le needles.