runltp: syscalls/mount0* and inotify03 tests are getting skipped from runltp's execution
Some of the tests which require a block device for their execution are skipped
when runltp is run without any block device being specified on commandline.Most
of such tests are from syscalls group and as a work around to make these tests
run even when no block device is specified,I have made use of loopback device
to create a block device with ext4 filesystem. So,runltp is modified to create
a block device and set the values for DEVICE and DEVICE_FS_TYPE accordingly.