QA/TestCases/LUKS Enter Passphrase (block device)

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 partitioning dialog
 * Select the checkbox item "Encrypt system" to select block device encryption
 * Enter and confirm the passphrase in a pop up dialog for the encrypted filesystem
 * choose default partitioning layout and continue to the disk druid partition screen
 * continue with installation

Expected Results

 * Confirmed "Encrypt system" item is checked
 * Confirm able to enter and confirm the passphrase in the pop up dialog
 * Proceed to the disk druid screen
 * Verify the default logical volume group (VolGroup00) displays a "locked" icon in the format column
 * 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-sda2   /dev/sda2    none