Remove Java 9-specific class references from the Java 8 jar

[David-Engel]

No description provided.

[cheenamalhotra]

We need to be able to build with JDK 1.8 - it seems there's an override in SqlServerDatabaseMetadata that should be split in a separate *43 class respectively and excluded for jre8 build.

    @Override
    public boolean supportsSharding() throws SQLException {
        DriverJDBCVersion.checkSupportsJDBC43();
        checkClosed();
        return false;
    }

[David-Engel]

We need to be able to build with JDK 1.8 - it seems there's an override in SqlServerDatabaseMetadata that should be split in a separate *43 class respectively and excluded for jre8 build.

@cheenamalhotra I saw that when I tried building with JDK 1.8. Since that class wasn't mentioned in the original issue, I thought I could skip it and hope the reference checking that is happening at load time in their scenario is not evaluating overrides.

[cheenamalhotra]

Yes, it's resolved on runtime as Java 8 doesn't have the API to override so it ignores but we should consider Eclipse environment errors too, and exclude all that contributes to errors. I would say this code is still present that's not applicable to jre8 and could be removed with no risk.