QA/TestCases/LUKS Enter Passphrase (root filesystem)

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 selecting the "Encrypt System" checkbox in anaconda, it is necessary to prompt the user for a passphrase to use for the encrypted filesystem.

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

Steps To Reproduce

 * Boot anaconda
 * Proceed to the disk druid partitioning screen
 * For the rootfs partition, select the checkbox item "Encrypt" to select filesystem encryption
 * Enter and confirm the passphrase in a pop up dialog for the encrypted filesystem
 * continue with installation

Expected Results

 * Confirmed "Encrypt system" item is checked
 * Confirm able to enter and confirm the passphrase in the pop up dialog
 * Verify installation completes successfully
 * Upon reboot, the user is asked for the LUKS passphrase at the console
 * Verify entry in /etc/crypttab is present for LUKS device

/etc/crypttab may look something like: luks-VolGroup00-LogVol00 /dev/mapper/VolGroup00-LogVol00 none