(doc): revert to siege for Load test

- added note in build for deleting the builds
- updated setup to repalce hey with siege
- other typo fixes

Fix #60,#61

Author: kameshsampath

documentation/modules/ROOT/pages/03scaling.adoc

@@ -339,16 +339,16 @@ watch oc get pods -n knativetutorial
 [#scaling-load-service]
 === Load the service
 
-We will now send some load to the greeter service.  The command below sends 50 concurrent requests (`-c 50`) for the next 10s (`-z 10s`) with no connection timeout(`-t 0`)
+We will now send some load to the greeter service.  The command below sends 50 concurrent requests (`-c 50`) for the next 10s (`-z 10s`) and test will run for 30 seconds (`-t 30S`)
 
 [source,bash,subs="+macros,+attributes",linenums]
 ----
-hey -z 10s -c 50 -t 0 \
-  -host "greeter.knativetutorial.example.com" \
+seige -r 1 -c 50 -t 30S -d 2 \
+  -H "Host: greeter.knativetutorial.example.com" \
   "http://pass:[${IP_ADDRESS}]"
 ----
 
-After youÄ've successfully run this small load test, you will notice the number of greeter service pods will have scaled to 5 automatically. You can also view the same via OpenShift dashboard as shown below:
+After you've successfully run this small load test, you will notice the number of greeter service pods will have scaled to 5 automatically. You can also view the same via OpenShift dashboard as shown below:
 
 image::greeter-00001-scaled.png[Greeter Service]
 

documentation/modules/ROOT/pages/04build/build.adoc

@@ -249,6 +249,26 @@ oc apply -n knativetutorial -f docker-build.yaml
 === build 
 include::partial$knative-objects.adoc[tag=knative-build]
 
+[NOTE]
+====
+The builds right now can't be started from the step where it has failed, you always need to start a new build by deleting the existing build followed by creating a new one again.
+
+e.g. 
+[source,bash,subs="+macros,+attributes"]
+----
+kubectl delete -n knativetutorial -f docker-build.yaml
+kubectl apply -n knativetutorial -f docker-build.yaml
+----
+
+.(OR)
+
+[source,bash,subs="+macros,+attributes"]
+----
+oc delete -n knativetutorial -f docker-build.yaml
+oc apply -n knativetutorial -f docker-build.yaml
+----
+====
+
 [#build-watching-logs]
 == Watching logs
 include::partial$watching-build-logs.adoc[]

documentation/modules/ROOT/pages/setup.adoc

@@ -44,16 +44,11 @@ The following CLI tools are required for running the exercises in this tutorial.
 | `dnf install httpie`
 |
 
-| https://golang.org[go]
-| `brew install golang`
-| https://dl.google.com/go/go1.11.5.linux-amd64.tar.gz
+| https://github.com/JoeDog/siege[siege]
+| `brew install siege`
+| https://github.com/JoeDog/siege  
 |
 
-| https://github.com/rakyll/hey[hey]
-| `go get -u github.com/rakyll/hey`
-| `go get -u github.com/rakyll/hey`
-| Add `hey` to the path using the command `export PATH=$HOME/go/bin:$PATH`
-
 | https://jsonnet.org/
 |`brew install jsonnet`
 | https://github.com/google/jsonnet
@@ -193,7 +188,7 @@ webhook-6d9568d-htxlt         1/1     Running   0          6h33m
 
 [source,bash,subs="+macros,+attributes"]
 ----
-kubectl apply --filename {knative-build-repo}/{knative-version}/build.yaml
+kubectl apply --filename {knative-build-repo}/{knative-version}/release.yaml
 ----
 
 [NOTE]