Describe the contribution

Fix #321

This is related to the change for #271, where the return value of this function depends on the configured timer interval. The coverage test case for this was not updated in the original change.

Testing performed
Build and execute OSAL coverage tests

Expected behavior changes
Test case now passes, as:

[BEGIN] 03 OS_VxWorks_SigWait
[ PASS] 03.001 coveragetest-ostimer.c:166 - Osapi_Internal_CallSigWaitFunc(0) (1111111) == 1111111 (1111111)
[ PASS] 03.002 coveragetest-ostimer.c:168 - Osapi_Internal_CallSigWaitFunc(0) (2222222) == 2222222 (2222222)
[ PASS] 03.003 coveragetest-ostimer.c:170 - Osapi_Internal_CallSigWaitFunc(0) (2222222) == 2222222 (2222222)
[  END] 03 OS_VxWorks_SigWait   TOTAL::3     PASS::3     FAIL::0      MIR::0      TSF::0      N/A::0   

FSW code is not changed.

System(s) tested on:
Ubuntu 18.04 LTS, 64 bit

Contributor Info
Joseph Hickey, Vantage Systems, Inc.

Community contributors
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