Merge pull request #821 from ddurnev/agents

[RJA-xxx][fix]: remove SNAPSHOT dependencies.
[RJA-xxx][fix] config access bug
[RJA-1794][fx] Spring security rules fix
Merge pull request #822 from bugzmanov/fb-remoting

[RJA-xxx][fix] config access bug
[RJA-1801][fix] Project Admin is not able to run workflows
Merge pull request #823 from bugzmanov/fb-remoting

[RJA-1801][fix] Project Admin is not able to run workflows
[RJA-1706][feature] expose agents and database health
[RJA-1805][fix]Button 'Change status to Ready' should not be shown and available when status is Busy or Ready
[RJA-1802][fix] Bad design of error message
Merge pull request #824 from bugzmanov/fb-remoting

[RJA-1706][feature] expose agents and database health
[RJA-1704][feature]: system property for switching metrics on/off(only for standalone mode)
REST API for clearing all gathered metrics.