XD-2155 UI: Add Tooltip Directive
XD-2155 Code review changes

* Change `angular.element('.popover').hide()` to `angular.element('.popover').remove()`
* Handle `angular.element('.popover').remove()` inside the directive not the controllers
Increase logging output from spring-xd-ui

This is necessary in order to diagnose failures on specific environments
Reverting build changes and restoring output levels
Ignoring SecurityConfigurationTests

Temporary, pending investigation on CI issues
Update readme to reference 1.0.1
Remove Kafka source and docs
More Kafka removal
Revert back to 1.0.1.SNAPSHOT for second pass at release