Update the title and fix the image link
Merge pull request #930 from anusha-r/master

Set visible_to_all_users to True by default.
Fix #932: handle spaces in hadoop job -list output

As mentioned in #932, spaces in the output of `hadoop job -list` cause listings for running jobs to be ignored by the following grep. This fixes the bug by allowing spaces at the beginning of job listing lines.
Use self.addCleanup to schedule tmpdir cleanups

After prepare_runner_for_ssh was called, the tmpdirs created were
unreliably cleaned up. Use self.addCleanup to schedule the cleanup so
that users of the function don't need to cleanup manually.
Remove exclusive file lock in runner wrapper

Cleanup the manually created file lock on script completion.
Add runner.cleanup on runner creation

Runners that are directly created need to run their cleanup steps.
Cleanup on failure in test

By default, there is no cleanup on failure.
Merge pull request #917 from tomelm/master

Update the title and fix the image link
Merge pull request #933 from alexkonradi/patch-1

Fix #932: handle spaces in hadoop job -list output
Merge pull request #935 from Yelp/test_cleanup_wrapper_lock

Remove exclusive file lock in runner wrapper
Merge pull request #934 from Yelp/test_cleanup_master_ssh_root

Use self.addCleanup to schedule tmpdir cleanups
Merge pull request #936 from Yelp/test_runner_cleanup

Test runner cleanup
use the xtrace flag to get more debugging output during bootstrap/running
Merge pull request #943 from jblomo/xtrace_bootstrap

use the xtrace flag to get more debugging output during bootstrap/runner
Revert "Remove exclusive file lock in runner wrapper"

This reverts commit 64fd5a6a83c182508c20b8ccfda9bf5092f347d8.
Merge branch 'taoyu_revert'
Merge pull request #946 from wlstyy/master

Revert 'Remove exclusive file lock in runner wrapper'
new emr tool for counting emr list active with state = starting hardcoded
count instance count emr list active
renaming count_emr_xxx to collect_emr_stats