Fix accumulo init

[phrocker]

Accumulo init still doesn't work. The logic for init-accumulo in manager relies on faulty logic

This is one error, below. There will be others.

/opt/accumulo/bin/accumulo org.apache.accumulo.server.util.ListInstances 2>/dev/null | grep -q "{{ .Values.accumulo.instance.name }}"; then

You need to fix this as ListInstances returns an empty table with the name accumulo-zookeeper so the instance name of accumulo hits on it. we need a more robust method