Fix race condition while attempting to stream logs from the builder pod.

[slack]

builder/rootfs/etc/confd/templates/builder

Line 139 in daac4b8

until [ "`kubectl --namespace=${POD_NAMESPACE} get pods -o yaml ${META_NAME} | grep "phase: " | awk {'print $2'}`" == "Running" ]; do

Is very prone to race conditions. If the builder pod either never makes it to Running or transitions through Running to Terminated we might hang forever.

[arschles]

after #72 is done, we should use the k8s API client directly and watch the event stream instead of polling kubectl