OS_rename unit test doesn't independently check parameter validity

[skliper]

Is your feature request related to a problem? Please describe.
Overloaded parameter test:

osal/src/unit-tests/osfile-test/ut_osfile_fileio_test.c

Lines 1096 to 1106 in cb95655

	UT_RETVAL(OS_rename(g_invalidPath, g_invalidPath), OS_FS_ERR_PATH_INVALID);
	/*-----------------------------------------------------*/
	/* #3 Path-too-long-arg */
	UT_RETVAL(OS_rename(g_longPathName, g_longPathName), OS_FS_ERR_PATH_TOO_LONG);
	/*-----------------------------------------------------*/
	/* #4 Name-too-long-arg */
	UT_RETVAL(OS_rename(g_longFileName, g_longFileName), OS_FS_ERR_NAME_TOO_LONG);

Describe the solution you'd like
Test each individually

Describe alternatives you've considered
None

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC