RSM

...G...... [DEV-1149] implemented server connector component

* commit 'a7e2fc7a0c73fd3c74d7b6b7d4fd4e3e652cef1c': (27 commits)
  ...G...... [DEV-1149] removed redundant logging and renamed io.Writer to Uploader interface
  ...G...... [DEV-1149] log server address in case there are no active checks
  ...G...... [DEV-1149] renamed uploader variable
  ...G...... [DEV-1149] renamed GetAddr() to Addr
  ...G...... [DEV-1149] improved debug of refreshActiveChecks
  ...G...... [DEV-1149] improved debug of Exchange() to include error
  ...G...... [DEV-1149] improved debug of Exchange()
  .......... [DEV-1149] added data upload started to fail warning; added GetAddr() function to retrieve address from result cache
  ...G...... [DEV-1149] unified result cache and server connector startup
  ...G...... [DEV-1149] moved server connection initialization into "New" function
  ...G...... [DEV-1149] renamed server connection structure and creation functions
  ...G...... [DEV-1149] renamed server_connector package to serverconnector
  ...G...... [DEV-1149] pass task manager and address to NewServerConnector() as parameters
  ...G...... [DEV-1149] unified data exchange and logging into single function for agent data upload and active checks request
  .......... [DEV-1149] added more logs
  .......... [DEV-1149] added active check configuration update is working again warning
  .......... [DEV-1149] added debug log to active check retrieval from Zabbix server
  ...G...... [DEV-1149] history uploader initial commit
  ...G...... [DEV-1149] use only one ticker and set output during initialization
  ...G...... [DEV-1149] flush checks
  ...