getUrl message is misleading

[davecramer]

aws-advanced-jdbc-wrapper/wrapper/src/main/java/software/amazon/jdbc/plugin/readwritesplitting/ReadWriteSplittingPlugin.java

Line 508 in 17d1a87

() -> Messages.get(

This message ends up looking like ```
WARNING: Failed to connect to reader host: 'database-1-instance-1.XYZ.us-east-1.rds.amazonaws.com/'

we should probably call getHost() instead.

[aaron-congo]

Hi @davecramer, can you clarify what is misleading about the message? If you compare the getUrl() and getHost() methods of the HostSpec class, using getHost() instead of getUrl() will only remove the slash at the end (also, if a port was specified, it will remove the port from the message).