kwok and perf updates

[jbusche]

Issue link

#625

What changes have been made

• Fixed the KWOK install instructions to the latest (easier) method
• Fixed the Items problem so that appwrappers launch
• Changed to a while loop that allows as few as 1 appwrapper or fake node to work now (didn't work before with the for loop)

Verification steps

Testing both from a MAC and on my OpenShift cluster

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • Testing is not required for this change

[openshift-ci]

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[jbusche]

/retest