Identification of changes in configuration of agent

[tingrida]

As Gepard-Administrator, I want to ensure that configuration for an Agent is marked as changed and needs to be transferred to the agent, only if changes in configuration happened.

Context: today configuration is transferred towards gepard agent at each polling interval. The goal is to do it just if change is required:

• configuration change was initiated towards config server
• initiated change has really changed something in configuration to be provided to this particular agent

Provide a hash of configuration to the agent during the polling?

Acceptance criteria:

• as long as no changes are initiated on the config server after the latest configuration updated, no new configuration update is indicated towards any of the agents
• if a configuration change initiated affects just agent A, new configuration update is indicated towards agent A, but no new configuration update is indicated towards agent B
• if a configuration change initiated affects agents A and B, new configuration update is indicated towards agents A and B