title: suppressing info messages from logback
body: <p>application i work will be created as jar file and run it through command line. there is no application servers involved.
  when i run the jar file below info from logback is printed on console. how do i suppress all logging from logback packages</p>
  
  <pre><code>13:46:30,534 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy]
  13:46:30,534 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
  13:46:30,534 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/Users/util/target/classes/logback.xml]
  13:46:30,588 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
  13:46:35,598 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
  13:46:35,605 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [stdout]
  13:46:35,621 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
  13:46:35,629 |-WARN in ch.qos.logback.classic.encoder.PatternLayoutEncoder@326de728 - [outputPatternAsPresentationHeader] property is deprecated. Please use [outputPatternAsHeader] option instead.
  13:46:35,661 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting additivity of logger [org.springframework] to false
  13:46:35,661 |-INFO in ch.qos.logback.classic.joran.action.LevelAction - org.springframework level set to ERROR
  13:46:35,661 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [stdout] to Logger[org.springframework]
  13:46:35,661 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [ch.qos.logback] to OFF
  13:46:35,661 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting additivity of logger [ch.qos.logback] to false
  13:46:35,665 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@24:27 - no applicable action for [priority], current ElementPath  is [[configuration][root][priority]]
  13:46:35,666 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [stdout] to Logger[ROOT]
  13:46:35,666 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
  13:46:35,666 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@25618e91 - Registering current configuration as safe fallback point
  </code></pre>
  
  <p>logback.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;configuration&gt;
  
      &lt;appender name="stdout" class="ch.qos.logback.core.ConsoleAppender" &gt;
          &lt;encoder&gt;
              &lt;pattern&gt;%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n&lt;/pattern&gt;
          &lt;/encoder&gt;
      &lt;/appender&gt;
  
      &lt;logger name="org.springframework" additivity="false"&gt;
          &lt;level value="error"/&gt;
          &lt;appender-ref ref="stdout"/&gt;
      &lt;/logger&gt;
  
      &lt;logger name="ch.qos.logback" level="OFF" additivity="false" /&gt;
  
      &lt;root&gt;
          &lt;priority value="warn"/&gt;
          &lt;appender-ref ref="stdout"/&gt;
      &lt;/root&gt;
  
  &lt;/configuration&gt;
  </code></pre>
  
  <p>tried all options as well as discussion at thread <a href="https://stackoverflow.com/questions/3401051/suppress-all-logback-output-to-console">Suppress all Logback output to console?</a>.</p>
  
  <p>nothing helped me, any pointers would be helpful. i am on logback version 1.0.13 and slf4j 1.7.5</p>