Add Reporting Mode

* Add a new operating mode to rippled called reporting mode
* Add ETL mechanism for a reporting node to extract data from a p2p node
* Add new gRPC methods to faciliate ETL
* Use Postgres in place of SQLite in reporting mode
* Add Cassandra as a nodestore option
* Update logic of RPC handlers when running in reporting mode
* Add ability to forward RPCs to a p2p node

src/ripple/core/impl/JobQueue.cpp

@@ -86,6 +86,8 @@ JobQueue::addRefCountedJob(
     if (iter == m_jobData.end())
         return false;
 
+    JLOG(m_journal.debug())
+        << __func__ << " : Adding job : " << name << " : " << type;
     JobTypeData& data(iter->second);
 
     // FIXME: Workaround incorrect client shutdown ordering