Fixed missing vars

Jenkinsfile-Squential

@@ -40,6 +40,8 @@ pipeline {
                                 echo 'not building'
                             }
     	                    if (BuildThis == true) {
+                                env.ImgRelease = ImgRelease
+                                env.ImgVariant = ImgVariant
                                 stage('Build image') {
                                  //   steps {
                                     // Build script