Description of problem:
as summary.

Version-Release number of selected component (if applicable):
v3.8.10-1 on devel server.

How reproducible:
100%

Steps to Reproduce:
1.the document for TestRun.create method about estimated_time was HH:MM:MM
2.user invoke TestRun.create with estimated_time as '11:22:33'.
3.user invoke TestRun.create with estimated_time as '11d22h33m44s'.

Actual results:
for step 2: system returns error like:Fault: <Fault 400: ["[('estimated_time', u'Enter a valid estimated time. e.g. 12h45m')]"]>
for step 3: system can create the run.

Expected results:
for step 2: system can create the run.
for step 3: system returns error like:Fault: <Fault 400: ["[('estimated_time', u'Enter a valid estimated time. e.g. 11:22:33')]"]>

Additional info: