Update backwards compatibility comments in the osapi-filesys functions

[skliper]

Really not backwards compatibility, but in support of abstraction and in the spirit of portability operations attempted on a FS_BASED file system that arn't actually allowed should no-op and return success.

[skliper]

Imported from trac issue 234. Created by jhageman on 2019-07-26T15:05:21, last modified: 2019-08-29T10:54:22

[skliper]

Trac comment by jhageman on 2019-07-26 15:13:27:

Milestone renamed

[skliper]

Trac comment by jhageman on 2019-08-19 17:13:13:

Fixed the mount/unmount messages, see [changeset:75161ec] in trac-234-filesys-compat-comments

Note there's still references to supporting backwards compatibility to unit tests. Preference is to fix the unit test code to fix what should be implemented in flight code, opened ticket #259.

[skliper]

Trac comment by jhageman on 2019-08-21 14:15:54:

CCB 8/21/2019 - changeset reviewed and approved for test

[skliper]

Trac comment by jphickey on 2019-08-22 16:12:45:

Merged into branch ic-ccb-20190821

[skliper]

Trac comment by jphickey on 2019-08-29 10:53:03:

CCB approved for development merge on 2019-08-27

[skliper]

Trac comment by jphickey on 2019-08-29 10:54:22:

Merged to development branch