Disabling nginx buffers to support jenkinc-cli

Prod related: #PROD-28881 (PROD:28881)

Change-Id: I5f6329d3d2a8f26812b75aea2d1ce967a62f16ed
diff --git a/kubernetes/control/services/drivetrain/jenkins_master.yml b/kubernetes/control/services/drivetrain/jenkins_master.yml
index a198dff..3437196 100644
--- a/kubernetes/control/services/drivetrain/jenkins_master.yml
+++ b/kubernetes/control/services/drivetrain/jenkins_master.yml
@@ -15,6 +15,12 @@
             value: false
           - name: nginx.ingress.kubernetes.io/add-base-url
             value: true
+          - name: nginx.ingress.kubernetes.io/proxy-body-size
+            value: "0"
+          - name: nginx.ingress.kubernetes.io/proxy-buffering
+            value: "off"
+          - name: nginx.ingress.kubernetes.io/proxy-request-buffering
+            value: "off"
           apiVersion: extensions/v1beta1
           cluster: drivetrain
           enabled: true