Merge pull request #863 from bugzmanov/master

[RJA-xxx][fix] chefsolo to support isGlobal parameter
[RJA-1904][feature]: take build providers from application context
not only from plugins
Merge pull request #864 from ddurnev/master

[RJA-1904][feature]: take build providers from application context
[RJA-1948][feature] - Define databag template format
[RJA-1948][feature] - Define databag template format
Merge pull request #865 from rsvato/databag-templates

[RJA-1948][feature] - Define databag template format
[RJA-xxx][fix]: don't fail when there are no build providers in app context
Merge pull request #866 from ddurnev/master

[RJA-xxx][fix]: don't fail when there are no build providers in app context
[RJA-1950][feature] - Define databag storage
Merge pull request #867 from rsvato/databag-templates

[RJA-1950][feature] - Define databag storage
[RJA-185][feature] rest and UI for scheduling env workflow execution
Merge pull request #868 from bugzmanov/cli

[RJA-185][feature] rest and UI for scheduling env workflow execution
[RJA-xx][feature] basic workflow events  bus