Remove double quotes from the environment variables (#24)

*Motivation*

Some of the environment variables still use double quotes. They result in the following

```bash
Could not find or load main class "
```
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Sijie Guo 2020-06-23 10:14:23 -07:00 committed by GitHub
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@ -496,9 +496,7 @@ autorecovery:
##
configData:
BOOKIE_MEM: >
"
-Xms64m -Xmx64m
"
## Pulsar Zookeeper metadata. The metadata will be deployed as
## soon as the last zookeeper node is reachable. The deployment