[tools] fix glog output colorizing for kudu CLI tests
[tools] fix glog output colorizing for kudu CLI tests

This patch adds the '--nocolorlogtostderr' flag to every invocation
of the kudu CLI tool run by the kudu::tools::RunKuduTool() function.

Prior to this fix, the following tests would fail if running in the
environment where the GLOG_colorlogtostderr variable is set to 1:

  ToolTest.TestTopLevelHelp
  ToolTest.TestModeHelp
  ToolTest.TestActionHelp
  ToolTest.TestActionMissingRequiredArg

Change-Id: I6635955182e8fdbb4406c9909a7a09a7d3a55955
Reviewed-on: http://gerrit.cloudera.org:8080/10865
Reviewed-by: Adar Dembo <866ca730bfc7f544e3ebce604ceeba4879f23df0@cloudera.com>
Tested-by: Kudu Jenkins

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