Fix pkgin parsing of package list

Previously the smartos package method would incorrectly parse some lines if they had strings that looked like package name/version pairs.

E.g.:

    # pkgin ls | grep py27-cairo
    py27-cairo-1.10.0nb2 Python bindings for cairo (python-2.x version)

Would be parsed like the following:

    2014-07-09T21:56:46+0000  verbose: /default/pkg/packages/'py27-cairo'[0]: Comparing [available] package (py27-cairo-1.10.0nb2,2.x,default) to [==] with given (py27-cairo,*,*) [name,version,arch]

That is, the package name was assumed to be `py27-cairo-1.0.0nb2` and the package version was assumed to be `2.x`. This would cause cfengine to always assume the package needs installing.

This update will correctly parse package names and versions even when the comment contains a string that looks like package name/version pairs.