test_spec: Remove formatted text file verions of IETF Draft

test_spec: Remove formatted text file verions of IETF Draft

Remove files with IETF copyrights (Internet Draft .txt files).
I assume these files have to be removed in C-stable branch...

JIRA: VSPERF-387

Change-Id: I76709ab055f845cec0bec8d07b14c29dec349f54
Signed-off-by: Al Morton <acmorton@att.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Bill Michalowski <bmichalo@redhat.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Antonio Fischetti <antonio.fischetti@intel.com>