title: Spring boot quartz: jdbc tables are always initailized
body: <p>We are using quartz in spring boot application.
  For storing job information, i have used jdbc store.
  In <code>application.properties</code> file, i have following:</p>
  <pre><code>spring.quartz.job-store-type=jdbc
  spring.quartz.jdbc.initialize-schema=always
  </code></pre>
  <p>But after every restart, tables are initialised, and all stored info is lost.
  If i change spring.quartz.jdbc.initialize-schema to never, i get exception while creating tables.</p>
  <p>I do not want to delete quartz table data after restart.
  Can you help me ?</p>
  <p>Regards,
  Stephan</p>