Remove OpenJDK deprecated options from Dockerfile

Currently when you start up, you get the following warnings. We should remove from JAVA_OPTS in Dockerfile.

```
jasperserver    | OpenJDK 64-Bit Server VM warning: ignoring option PermSize=32m; support was removed in 8.0
jasperserver    | OpenJDK 64-Bit Server VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0
```