tree cc96f1147e7f31a802650952abb4a5db5ce2c1ac
parent 57491eaa7e6392c87827f788d83e20db0b0def30
author Masayuki Igawa <masayuki@igawa.io> 1551877297 +0900
committer Masayuki Igawa <masayuki@igawa.io> 1551877297 +0900
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Set concurrency default value

This commit sets the default value 0 for tempest run command.
Because stestr's run_command() requires an int value for that, but we
passes `None` if users don't specify a concurrency value. We found that
behavior with recent stestr change[0]. But we also have the bug in
tempest side.

[0] https://github.com/mtreinish/stestr/issues/231

Change-Id: I83f76acb6a106f7401904a910a5dced47c2db839