title: Liquibase DiffChangelog ignores existing MySQL views
body: <p>I have the following problem with Liquibase DiffChangelog operation:</p>
  
  <p>I'm using Mysql 5.1, Liquibase 3.3.0 and mysql-connector-java-5.1.28.jar. I try to diff 2 databases with respectively 1 table and 1 view. If I run DiffChangelog a change log is generated that contains a changeSet with createView element although both databases contain the same view definitions.</p>