title: unable to set environment variable in jenkinsfile
body: <p>I am trying to set an environment variable with name "TEST_CONFIG_ROOT" in my Jenkins pipeline, I am referring to examples here:</p>
  
  <p><a href="https://jenkins.io/doc/book/pipeline/jenkinsfile/#working-with-the-environment" rel="noreferrer">https://jenkins.io/doc/book/pipeline/jenkinsfile/#working-with-the-environment</a></p>
  
  <p>But, When I am executing my test, it appears that env variable is not set, because my test still complains that it did not get the value of the variable "TEST_CONFIG_ROOT" which it was supposed to get from env.</p>
  
  <p>Please see my jenkinsFile below:</p>
  
  <pre class="lang-java prettyprint-override"><code>node('node1'){
  
  
          def buildInput;
  
        echo 'Deploying my build'
       if(!params.buildName) {
           buildInput = input(
                   id: 'userInput', message: 'What is the build name?', parameters: [
                   [$class: 'StringParameterDefinition', defaultValue: 'abcd-1', description: 'Environment', name: 'buildName']
           ])
        }
        buildToUse = params.buildName ? params.buildName : buildInput;
        echo ("Env: "+buildToUse);
  
  
  
      if ( "${params.buildParam}" == 'prequal' || !params.buildParam ){
          stage('Prequal') {
  
  
          }
      }
  
  
      node('nodename'){
  
          if ( "${params.buildParam}" == 'test' || !params.buildParam ){
              withMaven(
                      maven: 'M2Slave',
                      mavenSettingsConfig: 'MavenSettingsXML',
                      mavenLocalRepo: '${HOME}/.m2/repository') {
  
                  stage('Test') {
                      echo 'Testing my build'
                      echo " my work space is ${env.WORKSPACE}"
                      checkout scm
  
                      environment {
                          TEST_CONFIG_ROOT = '${env.WORKSPACE}/testsE2e/src/main/resources'
  
                      }
  
    dir ( 'testsE2e'){
   sh 'mvn clean verify surefire-report:report surefire-report:failsafe-report-only -Dtestngxml=testng.xml -Dhttp.proxyHost=proxy02.com -Dhttp.proxyPort=8080 -Dhttps.proxyHost=proxy02.com -Dhttps.proxyPort=8080  -Djavax.xml.accessExternalSchema=all'
                          }
  
                  }
  
              }
          }
  
      }
  
  }
  </code></pre>
  
  <p>I also tried executing the export command using the shell script as below, but this is also not helping.</p>
  
  <pre><code>echo " my work space is ${env.WORKSPACE}"
  sh  'export TEST_CONFIG_ROOT="${WORKSPACE}/testsE2e/src/main/resources"'
  </code></pre>
  
  <p>Find below snippet of log when the pipeline job is executed:</p>
  
  <pre><code>[Pipeline] echo
   my work space is /usr/home/nodename/Jenkins/workspace/workspace/someName-RCZ4A4MA3GRP4PSVYT4HTVVIKU4J7TW2667CKTZU22CHR2CBEM5Q
  [Pipeline] dir
  Running in /usr/home/nodename/Jenkins/workspace/workspace/someName-RCZ4A4MA3GRP4PSVYT4HTVVIKU4J7TW2667CKTZU22CHR2CBEM5Q/testsE2e
  [Pipeline] {
  [Pipeline] sh
  [testsE2e] Running shell script
  + mvn clean verify surefire-report:report surefire-report:failsafe-report-only -Dtestngxml=testng.xml -Dhttp.proxyHost=proxy02.com -Dhttp.proxyPort=8080 -Dhttps.proxyHost=proxy02.com -Dhttps.proxyPort=8080 -Djavax.xml.accessExternalSchema=all
  ----- withMaven Wrapper script -----
  Picked up JAVA_TOOL_OPTIONS: -Dmaven.ext.class.path="/usr/home/nodename/Jenkins/workspace/workspace/someName-RCZ4A4MA3GRP4PSVYT4HTVVIKU4J7TW2667CKTZU22CHR2CBEM5Q@tmp/withMaven00e87287/pipeline-maven-spy.jar" -Dorg.jenkinsci.plugins.pipeline.maven.reportsFolder="/usr/home/nodename/Jenkins/workspace/workspace/someName-RCZ4A4MA3GRP4PSVYT4HTVVIKU4J7TW2667CKTZU22CHR2CBEM5Q@tmp/withMaven00e87287" 
  Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T08:41:47-08:00)
  Maven home: /opt/maven/apache-maven-3.3.9
  Java version: 1.8.0_111, vendor: Oracle Corporation
  Java home: /opt/oracle/jdk1.8.0_111/jre
  Default locale: en_US, platform encoding: UTF-8
  OS name: "linux", version: "2.6.32-573.7.1.el6.x86_64", arch: "amd64", family: "unix"
  [jenkins-maven-event-spy] INFO generate /usr/home/nodename/Jenkins/workspace/workspace/someName-RCZ4A4MA3GRP4PSVYT4HTVVIKU4J7TW2667CKTZU22CHR2CBEM5Q@tmp/withMaven00e87287/maven-spy-20170924-225639-49.log ...
  [INFO] Scanning for projects...
  </code></pre>