AWS Keyspaces do not support COUNT

[alniks]

It's used internally by migrator to check if the version table exists:

boolean versionTableExists() {
        try {
            countMigrations(getTableName());
        } catch (Exception e) {
            return false;
        }
        return true;
    }

in case of AWS Keyspaces the above method will always return false and migrator will try to create version table, which will lead to an exception.

One option is to use [ IF NOT EXISTS ] clause for Cassandra DB and do not check existence of the table:

CREATE TABLE [ IF NOT EXISTS ] table_name

[ipolevoy]

TODO: cherry-pick to master after verification that this is resolving the Keyspaces issue.