Add table jira_global_setting. closes #19

[sayan133]

Integration test logs

Logs

``` N/A ```

Example query results

Results

### Basic info ```sql select voting_enabled, watching_enabled, sub_tasks_enabled, time_tracking_enabled, time_tracking_configuration from jira_global_setting; ``` ``` +----------------+------------------+-------------------+-----------------------+----------------------------------------------------------------------------------------------+ | voting_enabled | watching_enabled | sub_tasks_enabled | time_tracking_enabled | time_tracking_configuration | +----------------+------------------+-------------------+-----------------------+----------------------------------------------------------------------------------------------+ | true | true | true | true | {"defaultUnit":"minute","timeFormat":"pretty","workingDaysPerWeek":5,"workingHoursPerDay":8} | +----------------+------------------+-------------------+-----------------------+----------------------------------------------------------------------------------------------+ ```