* Braintree Integration WIP

* Braintree integration

* Link in config + settings after save

* Code cleanup

* Code cleanup

* JS beautify issue

* Codacy corrections

* Spaces to tabs

* [fix] refactor integration services

* [fix] patch fix

* [fix] added redirect url.

* [fix] custom redirect to and reditect message for paypal and service setup information

* [minor][fix] remove ldap dependancy from requirements

* [enhancement] integration borker and controller

* [minor][fix] parameter naming changes

* [fix] common scheduler for integration service

* [fix] integrations

* [patch] patch to move payment gateway in Integration Service

* [fix] add payment success, cancel and failuer handling pages

* [enhancment] dropbox integration merged in integration services

* provision to add custom parameters

* [fixes] patch fix to setup dropbox settings

* [fixes] removed dropbox backup, api usage note for paypal and razorpay

* [minor][fix] deprecate service events

* [fix] return type fix for checkout urls

* [fix] add custom settings via patch for dropbox backup frequency

* [fix] remove gride editting

* [enhance] ldap based login

* [enhance] login via ldap credentails

* [commit] remove parameter table, save params as json dict