Oracle throws "ORA-01008: not all variables bound" for parametrized query with comments

It's [Oracle.ManagedDataAccess.Client](https://www.nuget.org/packages/oracle.manageddataaccess/) bug (latest known netfx working version [12.1.2400](https://www.nuget.org/packages/Oracle.ManagedDataAccess/12.1.2400), no working version for [.NET Core](https://www.nuget.org/packages/Oracle.ManagedDataAccess.Core/) lib)

See NH1171 tests. Should enable them back for Oracle when issue is fixed.