Use dynamic include's servlet context when including the search JSP

• Type: Technical Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: Master
• Component/s: Workflow
• Labels: None
• Git Pull Request: https://github.com/liferay/com-liferay-portal-workflow/pull/204

Currently, when we include  navigation.jsp it always use workflow portlet's servlet context. This is limiting because we will want to include JSPs from other bundles (notably, Kaleo Designer's). If we use the workflow portlet servlet context, these external JSPs will not be available. Luckly, dynamic includes already should have their bundle's servlet context available in them. So, instead of using the current servlet context, let's  make the dynamic include's servlet contexts accessible and use them to include the search JSP.