title: How read value from properties file and put into JSON file
body: <p>I have liquibase.json file. Threa are: </p>
  
  <pre><code>"runningAs": {
              "username": "Programer200"
            }
  </code></pre>
  
  <p>I try to creat custom property:</p>
  
  <pre><code>liquibaseuser=root
  </code></pre>
  
  <p>Is it possible put value of liquibaseuser to liquibase.json ?</p>