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: I03e09a6db71067f8872d653da6280b4d829fae51
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>
Reviewed-by: Martin Klozik <martinx.klozik@intel.com>