title: Cannot get system variable via System.getenv(variable) in azure functions
body: <p>I cannot get environment variable in azure functions.
  I have added system variables via azure portal and dont get it using <code>System.getProperties() and  System.getenv()</code>.</p>
  
  <p>I tried get it from code via <code>System.getenv("test")</code>, but response is <code>null</code>. </p>
  
  <p>I also tried <code>System.getProperties()</code> to show all variables, but "test" doesn't appear there.<br/></p>
  
  <p>Finally I invoke from java code windows command line <code>Runtime.getRuntime() exec("cmd /c set")</code>
  and there was the "test" param. According to azure documentation
  <a href="https://docs.microsoft.com/en-us/azure/azure-functions/functions-reference-java#environment-variables" rel="nofollow noreferrer">documentation</a>
   I could get param via <code>System getenv()</code>, but this doesn't work for me.</p>
  
  <pre><code>Java System.getenv("test") output from azure functions:
  null
  
  Java System.getProperties() output from azure functions:
  
  java.runtime.name : OpenJDK Runtime Environment
  sun.boot.library.path : D:\Program Files\FunctionsJava\zulu8.36.0.1-jre8.0.202-win_x64\bin
  java.vm.version : 25.202-b05
  java.vm.vendor : Azul Systems, Inc.
  java.vendor.url : http://www.azulsystems.com/
  path.separator : ;
  java.vm.name : OpenJDK 64-Bit Server VM
  file.encoding.pkg : sun.io
  (... and other java params)
  
  
  Java Runtime.getRuntime().exec("cmd /c set") output from azure functions:
  (...)
  APPSETTING_test=teststext &lt;- here exists with prefix APPSETTING :)
  test=teststext &lt;- and the variable test that i set
  (... )
  </code></pre>