Fixing various entities for SLES

Adds SLES and OpenSUSE support for Nginx, RabbitMQ and Java based entities. Example blueprint for RabbitMQ as follows, started successfully on SLES.
```YAML
# RabbitMQ on SLES 11 SP3
name: "Rabbit MQ Application"
location:
  jclouds:aws-ec2:us-east-1:
    imageId: us-east-1/ami-e572438c
    hardwareId: m3.medium
services:
- serviceType: brooklyn.entity.messaging.rabbit.RabbitBroker
  name: "Rabbit MQ Broker"
```