managing multiple gremlin server connection urls

[rrmerugu]

Connect to and Manage multiple connection(gremlin) URLs. Label the connection URL with a verbose name, create a flag that shows the result of last connection attempt.

• [x] Connect to a gremlin server and visualise [P1]
• [x] Disconnect from gremlin server [P1]
• [ ] Switch to a new gremlin server connection / url.

Example: Save something like this in the background.

{
   "connectionUrl": "http://localhost:8182/gremlin",
   "connectionName": "Local",
   "authToken": null,
   "isLastConnectionAttemptSuccess":  true
}

[rrmerugu]

Deferring managing multiple connections ..