Adding submodule for ATS

Coversheet	Value
Meeting ID	#MEETING_ID#
Source	#SOURCE#
CR Title	#CR_TITLE#
CR Against Release	#RELEASE#
CR Against TS/TR	#TS_AGAINST#
Work-item	#WI#
Reason	#REASON#
Type of change	Editorial
Clauses	#CLAUSES#
Other comments

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