Update dependency dbutils to 1.8

[deenar]

Dbutils 1.7 isn't thread safe. https://issues.apache.org/jira/browse/DBUTILS-135. A fix is available in DbUtils 1.8 (due to be released shortly).

[timmolter]

Thanks. I'll keep an eye out for it. Feel free to post a message here when it's available.

[deenar]

For those who want to use Yank in a multi-threaded scenario one can downgrade dbutils to 1.6, see below. it is binary compatible.

  <groupId>org.knowm</groupId>
  <artifactId>yank</artifactId>
  <version>3.3.3</version>
  <exclusions>
    <exclusion>
      <groupId>commons-dbutils</groupId>
      <artifactId>commons-dbutils</artifactId>
    </exclusion>
  </exclusions>
</dependency>
<dependency>
  <groupId>commons-dbutils</groupId>
  <artifactId>commons-dbutils</artifactId>
  <version>1.6</version>
</dependency>