Fix all invalid IPs in the iptables nat file

Modify fixaddr to check every entry in the nat rules file instead of
just looking at the last entry.
Fix race condition in secure_cartridge

Remove Dir.chdir and use absolute file paths instead because chdir is
not thread-safe.

Bug 998345
Bug 1025043
Show upgrade rates
Fix bug 995638: do not store stderr in a variable during interactive psql
splitting runtime tests
Merge pull request #4092 from ncdc/fix-all-invalid-iptables-ips

Merged by openshift-bot
Merge pull request #4091 from ncdc/fix-secure-cartridge-race-condition

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Merge pull request #4093 from liggitt/show_upgrade_rates

Show upgrade rates
Added check to ensure the new cartridge does not clash with existing web_proxy
Bug 1019163
fix bz1006083 - recheck with node if gear is truly gone
Fix bug 1022336: alias lsof to lsof -w
Merge pull request #4099 from pmorie/bugs/995638

Merged by openshift-bot
Merge pull request #4098 from danmcp/master

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Remove all uses of #chdir in threaded code
Merge pull request #4100 from lnader/master

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Merge pull request #4096 from rajatchopra/fix_1006083

Merged by openshift-bot
Merge pull request #4102 from pmorie/bugs/1022336

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Fixing the run_jobs logic for op groups being rolled back
Merge pull request #4084 from rajatchopra/master

Merged by openshift-bot