QA/TestCases/LUKS Encrypted RAID partitions, no mds encrypted

Description
Support the use of encrypted filesystems for anything other than /boot using cryptsetup and LUKS. This includes install time creation/configuration, as well as integrated support in mkinitrd and initscripts (others?). Currently we are only pursuing support for encrypted devices using cryptsetup/LUKS.

When using encrypted file systems/block devices, the functionality should continue to work as expected, and not create situations where the encryption leads to undesired errors.

References:
 * 1) Anaconda/Features/EncryptedBlockDevices
 * 2) Releases/FeatureEncryptedFilesystems

Steps To Reproduce

 * start the installer
 * enter the disk druid paritioning screen
 * Create multiple new encrypted RAID partitions
 * select the "encrypt" checkbox for the each partition
 * enter a passphrase for the partition
 * create one or more non-encrypted filesystems using the RAID partitions
 * continue the installation

Expected Results
in post-install system, verify:
 * install completes successfully
 * RAID partitions are encrypted, and have entries in /etc/crypttab
 * none of the filesystems created are encrypted