Added a flow to fetch configuration of CDS via RPC
Added a flow to fetch information about synced cordapps from CDS via RPC
Added lastUpdated field to ArtifactsMetadataCache to be able to check when the sync has been done last time
Changed the way how configuration is resolved. Now if cordapp syncer configuration file path is not explicitly provided via the CorDapp config - then cordapp syncer will be configured from the same file as the CorDapp itself
Cleaned up the code, removed gradle warnings, fixed cross-cordapp dependency issues