False positive on zenoss package check

If you have installed http://deps.zenoss.com/yum/zenossdeps-4.2.x-1.el6.noarch.rpm you'll hit https://github.com/zenoss/core-autodeploy/blob/4.2.4/core-autodeploy.sh#L108

It might make sense to exclude the deps rpm? maybe something like this (untested, just an illustration):

```
if [ `rpm -qa | egrep -c -i '^zenoss[^dep]'` -gt 0 ]; then
```
