Revert "Increase waitTimer for OLT to be up in case of in-band mode to 540s"

This reverts commit 8ba5ebe76083803187c0f7dbc4b969aa90f236ff.

Reason for revert: Error during build - "sleep: invalid time interval ‘waitTimerForOltUp’"

Change-Id: I425580b6d047d90534ebba0efe9902dc748f5264
diff --git a/Jenkinsfile-voltha-build b/Jenkinsfile-voltha-build
index 768b01d..24d6d14 100644
--- a/Jenkinsfile-voltha-build
+++ b/Jenkinsfile-voltha-build
@@ -338,15 +338,11 @@
                 }
                 stage('Restart OLT processes') {
                     for(int i=0; i < deployment_config.olts.size(); i++) {
-                        int waitTimerForOltUp = 360
-                        if ( params.inBandManagement ) {
-                            waitTimerForOltUp = 540
-                        }
                         timeout(15) {
                             sh returnStdout: true, script: """
                             ssh-keyscan -H ${deployment_config.olts[i].sship} >> ~/.ssh/known_hosts
                             sshpass -p ${deployment_config.olts[i].pass} ssh -l ${deployment_config.olts[i].user} ${deployment_config.olts[i].sship} 'rm -f /var/log/openolt.log; rm -f /var/log/dev_mgmt_daemon.log; rm -f /var/log/openolt_process_watchdog.log; reboot' || true
-                            sleep waitTimerForOltUp
+                            sleep 360
                             """
                         }
                         timeout(15) {