[kudu-CR] KUDU-1911 improve missing required arg message

["Sam Okrent (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins,

I'd like you to reexamine a change.  Please visit

    http://gerrit.cloudera.org:8080/6986

to look at the new patch set (#2).

Change subject: KUDU-1911 improve missing required arg message
......................................................................

KUDU-1911 improve missing required arg message

When using a tool that has a required positional argument, excluding that
argument or passing it as a flag caused a confusing error message to be
printed out ("must provide missing_argument"). This commit changes
the message to "must provide positional argument missing_argument".

Change-Id: I2128a01da5c4929981b2ea46a32b0f7b9dd066e1
---
M src/kudu/tools/kudu-tool-test.cc
M src/kudu/tools/tool_main.cc
2 files changed, 25 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/86/6986/2
-- 
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I2128a01da5c4929981b2ea46a32b0f7b9dd066e1
Gerrit-PatchSet: 2
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Sam Okrent <sa...@cloudera.com>
Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Dan Burkert <da...@apache.org>
Gerrit-Reviewer: Kudu Jenkins