MSKCONTROL-35:

- Connector interface and HttpConnector implementation updated to request component's thresholds from agent.
- V1Parser updated to parse thresholds response.
- ThresholdsUpdater introduced to execute periodical thresholds data updates.
- Configuration class updated to configure ThresholdsUpdater.
- Containers such as Application or Component updated & few new ones added to store thresholds related data.
- StartListener updated to launch periodical threshold updates.
- MainViewAction updated to prepare thresholds data by components for JSP page.
- MainView.jsp partially reformatted (it was partially ugly formatted) without impact on how it's being rendered.
- MainView.jsp updated by introducing Bootstrap modals to show thresholds info in overlay.
- Components are clickable now. Component's thresholds info opens by click.
- Related styles added to common.css.
- Refresh page JavaScript updated to not touch the page while thresholds info modal is opened.