Fix #631, Add new functional tests for OS_chmod

[zanzaben]

Describe the contribution
Fixes #631 by adding new function tests

Testing performed
These new test, but ran them on the branch from #650

Expected behavior changes
The new tests added to make test

Additional context
Dependant on #650

System(s) tested on
Ubuntu 20.04

Contributor Info - All information REQUIRED for consideration of pull request
Alex Campbell GSFC

[astrogeco]

CCB 20201202 - APPROVED

• depends on fix #650 OS_chmod uses read or write access. #663

[jphickey]

Unfortunately this PR appears to have broken the file-api-test on RTEMS ....

[BEGIN] 04 TestChmod
OS_FileOpen_Impl():111:open(/RAM/Filename1): Invalid argument
[ FAIL] 04.001 file-api-test.c:257 - status after creat = -1
[ FAIL] 04.002 file-api-test.c:259 - status after close = -16

[astrogeco]

Unfortunately this PR appears to have broken the file-api-test on RTEMS ....

[BEGIN] 04 TestChmod
OS_FileOpen_Impl():111:open(/RAM/Filename1): Invalid argument
[ FAIL] 04.001 file-api-test.c:257 - status after creat = -1
[ FAIL] 04.002 file-api-test.c:259 - status after close = -16

Can you open an issue? @zanzaben do you have a way to test on RTEMS?

[zanzaben]

Unfortunately this PR appears to have broken the file-api-test on RTEMS ....

[BEGIN] 04 TestChmod
OS_FileOpen_Impl():111:open(/RAM/Filename1): Invalid argument
[ FAIL] 04.001 file-api-test.c:257 - status after creat = -1
[ FAIL] 04.002 file-api-test.c:259 - status after close = -16

Can you open an issue? @zanzaben do you have a way to test on RTEMS?

I do not have a way to test on RTEMS