Fix frontend system_proxy_delete/system_proxy_set

OpenShift::Runtime::FrontendProxyServer#system_proxy_delete and
OpenShift::Runtime::FrontendProxyServer#system_proxy_set: Return values in
a consistent ordering (stdout, stderr, exit status) irrespective of whether
arguments were passed.

Previously, these methods returned the exit status as the first value
instead of the last if no arguments were provided.

Fix the corresponding test cases to expect the correct ordering.

This commit fixes bug 1121238.
race condition in haproxy reload

https://bugzilla.redhat.com/show_bug.cgi?id=1123054
Bubble up config suggestions compared to other the suggestions of the same level of importance
Origin UI 190 - Expose region for app create and show, region and zone on gear page for admin-console
Bug 1123587 - Added OPENSHIFT_POSTGRESQL_LOCALE environment variable
Merge pull request #5657 from bparees/haproxy_race

Merged by openshift-bot
Merge pull request #5625 from Miciah/bug-1121238-fix-frontend-system_proxy_delete-and-system_proxy_set-methods-return-value-ordering

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Merge pull request #5660 from jwforres/bug_1064304_bubble_up_config_suggestions

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Merge pull request #5664 from mfojtik/postgresql

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Merge pull request #5633 from jcantrill/190_expose_region_and_zones

Merged by openshift-bot