Upstreaming from: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=183360

Description of problem:
beagle-0.2.1-12 includes a cron task intended to crawl contents from several system-wide locations, 
like documentation files and applications shortcuts. This cron task is implemented by the /usr/libexec/
beagle-crawl-system sh script.

Since beagle refuses to run as root, this crawling task is ran as user beagleindex, storing the indexes 
under /var/cache/beagle/indexes. The problem is that beagle-crawl-system runs as root and invokes 
beagle through su to impersonate beagleindex user. However, since the beagleindex user has no shell, 
the invocation to beable fails.

I have attached a patch to impersonate the beagleindex user and invoking beagle using /bin/bash.

Version-Release number of selected component (if applicable):
beagle-0.2.1-12

How reproducible:
Always

Steps to Reproduce:
1. As root, launch /usr/libexec/beagle-crawl-system
2. Nothing will happen
3.