Remove json related modules

Add options to script module
Fix basic_stream_tests

- Replace json-field-value-extractor processor with splitter that uses
XD-1378: Add metadata to Splunk module
Fix tweet tests.

Use hyphenated module name 'aggregate-counter' and correct option.
XD-1435 Update Executions Page

- Added job name, instanceId along with the conditional check to show
restart action button only if the job execution is restartable.
- Fixed the JobExecution list to refresh the list upon restart action
XD-1436 Miscellaneous cleanup in UI

- Fix subtitle text on each tab in Jobs page that would vary based on
the tab selected.
- Fix job name display in Job launch page
- Style fix for batch job and subtitle so that avoids empty lines
occupying the prime view