Merge pull request #38 from xqliu-talend/maintenance/5.6

TDQ-8724 for jdbc connection always get "Confirm Reload Connection" dial...
TUP-2219 : Allow features installed dynamically to be checked for updates
TUP-2219 : refactored the "install aditional package" runtime : removed
ExtraFeatureFactory unnecessary APIs.
TDI-29234 fix bug: #LINK@NODE doesn't work well as the condition when
TABLE IF in the schema
https://jira.talendforge.org/browse/TDI-29234
Merge branch 'maintenance/5.6'