Add mechanism to lookup specific package information

[movitto]

Native package system lookup method for rpm and deb
package systems are provided as well as an abstract
mechanism so the user doesn't have to know distro details

[coveralls]

Coverage increased (+0.06%) when pulling d887a9b on movitto:get-pkg-info into 614e93d on ManageIQ:master.

[jrafanie]

prefer each_with_object over inject for modifying hashes like this so you don't have to care about returning the object at the end of the block.

[jrafanie]

I also suggest you process the line(s) in a method so you can write tests with lots of different input without having to call/stub apt-cache.

[movitto]

@jrafanie @Fryguy updated, here are my thoughts:

• the return value of inject is what is actually returned from the method so it is needed in those cases
• tried splitting the per-line processing as we did w/ fstab but it's tricky in this case since most of the tag processing is to maintain an in_description state that spans across multiple lines. Did my best to try to split it up while keeping it clean / simple
• Rpm and Deb have been changed to subclasses of Package. The delegator method is needed incase the user does not know or does not want to have to deal w/ the Distro details before delegating to the native package call. The patch I submitted to bundler_ext (see the referenced PR above) relies on this so that bundler_ext can extract native package system info w/out worrying about the specifics.

Shout out if anything else looks off / needs to be updated to make this in.

[coveralls]

Coverage increased (+0.06%) when pulling 01f063d on movitto:get-pkg-info into 614e93d on ManageIQ:master.

[Fryguy]

the return value of inject is what is actually returned from the method so it is needed in those cases

each.with_object also returns the accumulated object

[coveralls]

Coverage increased (+0.06%) when pulling 541b185 on movitto:get-pkg-info into 614e93d on ManageIQ:master.

[jrafanie]

All good to me 👍. @Fryguy Did you have anything else before this is merged?

[jrafanie]

@Fryguy indicates we're all good.