Fix php configuration bugs.
<broker.conf> default to usage db tracking on

As there is little overhead to tracking usage in DB, and it's a
bit of a pain to initialize tracking after an installation is in
use, it seemed easiest to default to tracking for now.
Idler whitelist.
Post v2 migration issues - some legacy DNS variables had capitals in them.
The symbolic link for the old cartridge was confusing the websocket test.
Merge pull request #2794 from mrunalp/bugs/php_config_issues

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Merge pull request #2793 from sosiouxme/usage-by-default

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Merge pull request #2797 from mrunalp/dev/idler_whitelist

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Merge pull request #2780 from rmillner/capital_dns

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Added psych dependency to openshift-console if psych has been split into a separate gem.
Merge pull request #2802 from kraman/master

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Bug 971876
Merge pull request #2804 from danmcp/master

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