title: Multiple contexts in Liquibase sql format file
body: <p>I'm trying to use multiple contexts support in Liquibase and I can't achieve the result. My changeset in SQL format looks as follows</p>
  
  <pre><code>--changeset bkolasa:1 context:new-db and !edb dbms:postgresql
  </code></pre>
  
  <p>Then when I execute command</p>
  
  <pre><code>java -jar liquibase.jar --contexts=new-db,edb --driver=org.postgresql.Driver --url=jdbc:postgresql://example.com:5432/liqtest?ssl=true&amp;sslfactory=org.postgresql.ssl.NonValidatingFactory --username=liqtest --password=liqtest --changeLogFile=mychangelog.sql update
  </code></pre>
  
  <p>the changeset is still loaded.</p>
  
  <p>My version of Liquibase is 3.2.2.</p>