Include gender & age in Constituent Summary Report

This is a follow up of issue CRM-13279 which was resolved for the
Participant Listing report only. In the Constituent Summary Report the
gender and age are missing from selectable fields, order-by and filter.
The fix follows the same pattern as the one for issue CRM-13279
CRM-15296 minor variable clarification
CRM-15296
comment fix
CRM-15320 Accounted for partial soft credits which previous code didn't
Batchupdate test fix to pass on jenkins
version fixes
Webtest fixes
Webtest fixes
Webtest fix - ensure user is admin before messing with payment processors
WebtestFix
Webtest fix
Webtest fix for failure
CRM-15333 - CRM_Utils_HookTest - Verify that return values are properly merged.
Possible multiplication of $fResult in $result

The old structure allowed for possible multiplication of $fResult in $result when a specific $fnSuffix hook was implemented in one module, but not in another.
We only want to add $fResult to $result if $fnName exists, so moved the array_merge() into that if-statement. Furthermore, if $numParams is not case-specified in the switch, at the array_merge(), $fResult could hold the result from a previous module (because in the default case $fResult is not being set), so we have to initialize $fResult to an empty array in the foreach().
CRM-15335 - Fix api explorer handling of number input
Api explorer - add loading icon to api.action
Race-condition fixes for webtests
Webtest cleanup
Webtest fixes