RPC raises errorCB when result is empty

- If service result is empty, it returns errorCB
- RPC can now raise errorCB if defined

Jira Issue: WP-1221
Merge pull request #45 from habibvirji/WP-1221-pzhFunctionalityFixes

RPC raises errorCB when result is empty
fixes regexpr on testing appId

Jira-issue: WP-1243
Merge pull request #46 from mlasak/WP-1243

fixes regexpr on testing appId
Added extra information in findConfigurableAPI(..)

Added information about uri in the result returned by
findConfigurableAPIs(..)

Jira issue: WP-933