ENT-12880: Removed duplicate slow integration test.

Jenkinsfile

@@ -121,15 +121,6 @@ pipeline {
                                 ].join(' ')
                             }
                         }
-                        stage('Slow Integration Test') {
-                            steps {
-                                sh script: [
-                                        './gradlew',
-                                        COMMON_GRADLE_PARAMS,
-                                        'slowIntegrationTest'
-                                ].join(' ')
-                            }
-                        }
                     }
                 }
                 stage('Same agent') {