SB: remove AppName (and PipeName?) from CFE_SB_PipeD_t

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In looking at SB code, I noticed that CFE_SB_PipeD_t has two character arrays, AppName and PipeName. AppName, particularly, is a waste of memory to have in each pipe structure (it should be maintained in one location) and there is an AppId field in the PipeD_t so it's not needed for finding pipes.

Same may go with PipeName, as the OSAL queue takes the name as a parameter (need to ensure the pipe name doesn't already exist in OSAL.)

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Imported from trac issue 256. Created by cdknight on 2018-10-23T14:24:29, last modified: 2019-03-01T15:27:58

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Trac comment by cdknight on 2018-10-23 22:15:56:

PipeName moved to a separate ticket as GetPipeName currently returns the char * from the struct. See #288

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Trac comment by cdknight on 2018-10-23 22:25:46:

see [changeset:61178a]

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Trac comment by jhageman on 2019-02-25 16:13:25:

2018/11/13: CCB noted "feedback reviewed; will annotate ticket". State is waiting for owner to complete this action.

CCB - Should review, not clear what action is.

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Note - AppName is the only remaining char array in the CFE_SB_PipeD_t structure. The best I can tell this ticket still needs investigation and/or proposed design update to resolve.