Error occurs if ConnectionFactoryOptions.PROTOCOL option is an empty string

[nakamura-to]

Hi. The error occurs in v1.1.0 but not in v1.0.0.

I guess we need to check if the protocol is empty here.
https://github.com/oracle/oracle-r2dbc/blob/1.1.0/src/main/java/oracle/r2dbc/impl/OracleReactiveJdbcAdapter.java#L407

In some cases,　r2dbc-pool sets an empty string to the ConnectionFactoryOptions.PROTOCOL option.
https://github.com/r2dbc/r2dbc-pool/blob/v1.0.0.RELEASE/src/main/java/io/r2dbc/pool/PoolingConnectionFactoryProvider.java#L180

[Michael-A-McMahon]

Thanks for finding this. The driver should be treating an empty string as if the protocol was not set.
I'll have a fix for this soon.