Error message for Deposit type

When the deposit is selected but no deposit type is specified, the
correct error message is displayed, that encloses both money deposit and
valuable item options.
Merge pull request #323 from ministryofjustice/73036954/deposit-error-message

Error message for Deposit type
Validation for Deposit ref_number

In cases when the deposit is given as payment then the reference number
must be provided.
Implement RedisSweeper, plus spec and redis:sweep rake task
Raise an error when Deposit reference present

But no money deposit is taken
Specified time zone on expries so that it works on all machines regardless of what time zone they are in.
Merge pull request #325 from ministryofjustice/redis-sweeper

Implement RedisSweeper, plus spec and redis:sweep rake task
Merge pull request #324 from ministryofjustice/deposit-scheme-ref

Validation for Deposit ref_number
Merge branch 'master' into 73036462-claimant2