Use only 10 SHA characters for dev builds instead of 40

[pmalek-sumo]

To mitigate the following error:

$ helm upgrade --install collection --namespace sumologic sumologic/sumologic \
    -f /sumologic/values.perk.yaml \
    --create-namespace \
    --version 2.1.0-rc.0-3-g5482116e84c5075b589a504f61f0f204a15a61e8
Release "collection" does not exist. Installing it now.
Error: failed pre-install: warning: Hook pre-install sumologic/templates/setup/setup-serviceaccount.yaml failed: ServiceAccount "collection-sumologic-setup" is invalid: metadata.labels: Invalid value: "sumologic-2.1.0-rc.0-3-g5482116e84c5075b589a504f61f0f204a15a61e8": must be no more than 63 characters

use only 10 SHA characters in dev version instead of 40.