DS_AddRemoveMid_Payload_t erroneously contains a CommandHeader

[dmknutsen]

Checklist (Please check before submitting)

• [x ] I reviewed the Contributing Guide.
• [x ] I performed a cursory search to see if the bug report is relevant, not redundant, nor in conflict with other tickets.

Describe the bug
There appears to be a copy and paste error in ds_msg.h. DS_AddRemoveMid_Payload_t erroneously contains a command header feild.

Expected behavior
Payloads should not contain headers.

Reporter Info
Dan Knutsen
NASA Goddard

[skliper]

DS/fsw/inc/ds_msg.h

Lines 408 to 413 in 2a6c6a2

	typedef struct
	{
	CFE_MSG_CommandHeader_t CommandHeader; /**< \brief cFE Software Bus command message header */
	CFE_SB_MsgId_t MessageID; /**< \brief Message ID to add to Packet Filter Table */
	} DS_AddRemoveMid_Payload_t;