ConfigurationManager Audit and Improvements

[ibrodkin]

This task is about Configuration Management improvements:

1. Client configuration management should be separate and minimalistic from the ConfigurationManager used for Chronolog Processes. This would allos to remove current ClientLib dependency on chronolog::ConfigurationManager implementation
2. Audit ChronoVisor, ChronoGrapher , and ChronoKeeper code and make sure all configurable parameters that are currently hard coded are made configurable
3. Separate RPC configuration parameters from the parameters that control data processing behavior internal to the respective modules and move the parsing and validation of these parameters' values from the ConfigurationManager and into the respective modules themselves. These methods just take json_objects that generic ConfigurationManager makes available.
4. Consider making Base RPCConfigurationManager class and module specific configuration classes that derive from the base one.

[ibrodkin]

I've started refactoring of the CodeManager code a few months back , then shelved the changes.

this needs to be picked up in connection with #256