meta-selftest: wic: Add test for --use-uuid / --fsuuid

- Mount a '/media' partition to wic-image-minimal.wks with a known UUID.
- In test_qemu, sort our output from checking the output of 'mount' as
  it may not be stable.  Also, do not check the exit code as passing any
  output to cut ensures a 0 exit code.
- Check for a 'UUID=' line in /etc/fstab with out expected output.

(From OE-Core rev: 6d9396b26218f3234701944f385d5c36face8121)

Signed-off-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-selftest/recipes-test/images/wic-image-minimal.wks

@@ -4,6 +4,7 @@
 
 part /boot --source bootimg-pcbios --ondisk sda --label boot --active --align 1024
 part / --source rootfs --ondisk sda --fstype=ext4 --label platform --align 1024 --use-uuid
+part /media --source rootfs --rootfs-dir=wic-image-minimal --ondisk sda --fstype=ext4 --label uuid-test --align 1024 --use-uuid --fsuuid 2c71ef06-a81d-4735-9d3a-379b69c6bdba
 part /mnt --source rootfs --rootfs-dir=wic-image-minimal --ondisk sda --fstype=ext4 --label core --align 1024
 
 bootloader --ptable gpt --timeout=0  --append="rootwait console=tty0"

meta/lib/oeqa/selftest/cases/wic.py

@@ -634,10 +634,13 @@ part /etc --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path bin/ --r
         self.remove_config(config)
 
         with runqemu('wic-image-minimal', ssh=False) as qemu:
-            cmd = "mount |grep '^/dev/' | cut -f1,3 -d ' '"
+            cmd = "mount |grep '^/dev/' | cut -f1,3 -d ' ' | sort"
+            status, output = qemu.run_serial(cmd)
+            self.assertEqual(output, '/dev/root /\r\n/dev/sda1 /boot\r\n/dev/sda3 /media\r\n/dev/sda4 /mnt')
+            cmd = "grep UUID= /etc/fstab"
             status, output = qemu.run_serial(cmd)
             self.assertEqual(1, status, 'Failed to run command "%s": %s' % (cmd, output))
-            self.assertEqual(output, '/dev/root /\r\n/dev/sda1 /boot\r\n/dev/sda3 /mnt')
+            self.assertEqual(output, 'UUID=2c71ef06-a81d-4735-9d3a-379b69c6bdba\t/media\text4\tdefaults\t0\t0')
 
     @only_for_arch(['i586', 'i686', 'x86_64'])
     @OETestID(1852)