Fix maintenance cleanup with gdpr option

[Dcoutelle]

Please be sure you are submitting this against the staging branch.

Q	A
Bug fix?	Y
New feature?	N
Automated tests included?	N
Related user documentation PR URL
Related developer documentation PR URL
Issues addressed (#s or URLs)	N
BC breaks?	N
Deprecations?	N

Description:

Command mautic:maintenance:cleanup -g is broken and lead to SQL error :

 [Doctrine\DBAL\DBALException]                                                                                                                                                                                    
  An exception occurred while executing 'SELECT id FROM leads l WHERE (l.last_active <= :date) OR ((l.date_added <= :date2) AND (l.last_active IS NULL)) LIMIT 10000 OFFSET 0' with params ["2016-04-10 07:09:05"  
  ]:                                                                                                                                                                                                               
                                                                                                                                                                                                                   
  Value for :date2 not found in params array. Params array key should be "date2"

Steps to reproduce the bug:

Run command mautic:maintenance:cleanup -g

Steps to test this PR:

1. Apply Patch
2. run mautic:maintenance:cleanup -g and see command running properly

[npracht]

👍

[npracht]

@Woeler i don't know why in our tests last time if was working... The variable was not correctly named, i think just code review is enough ;)

EDIT: @Woeler the dry run option is not running the same variables, that can explain why.

[Woeler]

Whoops sorry, been a bit busy moving haha. Yea I'm not entirely sure anymore. I might have also looked at the wrong data then, anyway, this should definitely do good.