Account for nil directory entries in FS code.

Modify Ext3, Ext4 and XFS filesystem code to filter out nil directory entries.

https://bugzilla.redhat.com/show_bug.cgi?id=1170320
https://bugzilla.redhat.com/show_bug.cgi?id=1170319
Collect AWS CloudFormation stacks and templates at refresh
Upgrade to SASS 3.4.9
Add new AWS Region EU Frankfurt

https://bugzilla.redhat.com/show_bug.cgi?id=1164033
drop support for passing VirtualColumn and Reflection objects

no app code ever passes virtual column or reflection objects to the
add_* methods, so we don't need to support that case.
Specs use case insensitive fqname for comparison

Automation engine uses lowercase names for domains, namespaces
class, instances and methods. It can be refered to in mix case in
the models. The fqname is critcal to locating files in the new
git based automated model, by having mixed case the search takes
longer so we are planning on using all lowercase name when storing
files in git and the fqname becomes all lowercase.
Add ClassCheck preference and disable StringLiteralsInInterpolation cops

[skip ci]
Merge pull request #1179 from tenderlove/drop_object_support

drop support for passing VirtualColumn and Reflection objects
Merge pull request #1186 from mkanoor/case_insensitive_fqnames

Specs use case insensitive fqname for comparison
Remove "initialize" method from StorageManager model.

The initialize method of the StorageManager model class was calling super()
and in so doing, not passing the proper args to the subclass. Given
this was all the method did, the entire method has been removed.

https://bugzilla.redhat.com/show_bug.cgi?id=1171286
https://bugzilla.redhat.com/show_bug.cgi?id=1171899
remove miq_region_id column from database backups table

The region id should be encoded in the primary key, so we shouldn't need
a special column
Merge pull request #1178 from blomquisg/bz1164033-new-amazon-region-eu

Add new AWS Region EU Frankfurt
Merge pull request #1169 from roliveri/ext3_dir

Account for nil directory entries in FS code.
Merge pull request #1177 from epwinchell/sass_gem_upgrade

Upgrade to SASS 3.4.9
revert sass gem to 3.1.20
Issue: #1200
Merge pull request #1202 from epwinchell/revert_sass_gem2

revert sass gem to 3.1.20
Fix session store on metric_fu environment
Merge pull request #1195 from roliveri/storage_manager

Remove "initialize" method from StorageManager model.
Simplify backup naming by leveraging my_region_number and removing caching.

Update/clarify specs to reflect new behavior.
A region is the database so it's never destroyed.

DatabaseBackup rows are also not replicated so there's no issue with having them in a multiple region database.