Is your feature request related to a problem? Please describe.
The unit tests and API documentation should match, where all status codes in the API documentation are tested in a unit test, and likewise all codes being tested for are documented in the API.

Describe the solution you'd like
Resolve the following mismatches:

File src/os/inc/osapi-module.h, function OS_SymbolLookup():

• OK: OS_ERROR
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

File src/os/inc/osapi-module.h, function OS_ModuleSymbolLookup():

• OK: OS_ERROR
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

File src/os/inc/osapi-module.h, function OS_SymbolTableDump():

• ONLY IN DOXY: OS_ERROR
• ONLY IN DOXY: OS_ERR_NOT_IMPLEMENTED
• ONLY IN TEST: OS_FS_ERR_PATH_INVALID
• OK: OS_INVALID_POINTER
• ONLY IN DOXY: OS_SUCCESS

File src/os/inc/osapi-module.h, function OS_ModuleLoad():

• ONLY IN DOXY: OS_ERROR
• OK: OS_ERR_NAME_TAKEN
• ONLY IN DOXY: OS_ERR_NAME_TOO_LONG
• OK: OS_ERR_NO_FREE_IDS
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

File src/os/inc/osapi-module.h, function OS_ModuleUnload():

• ONLY IN DOXY: OS_ERROR
• ONLY IN TEST: OS_ERR_INVALID_ID
• OK: OS_SUCCESS

File src/os/inc/osapi-module.h, function OS_ModuleInfo():

• OK: OS_ERR_INVALID_ID
• OK: OS_INVALID_POINTER
• OK: OS_SUCCESS

Additional context
Originally noted in #331, split into separate work items.

Requester Info
Joseph Hickey, Vantage Systems, Inc.