Create Zend_Captcha.php

Added spanish translations.
#6625 - s/de/del as per @Maks3w's review:

 > captcha es un nombre (no un adjetivo) por lo que `de` debería de ser `del` (de + el)
 >
 > captcha word is a noun (not an adjective) so you should replace `de` with `del`
 >
 > Lo mismo para las demás traducciones.
 >
 > Apply the same to the rest of translated messages.
Merge branch 'i18n/#6625-zend-captcha-spanish-translation'

Close #6625
* ZF2 #6719: Zend\Db\Sql\Select::order(): accept ExpressionInterface
instead of Expression
* Add unit test for ordering using ExpressionInterface
* Improve existing unit test for ordering using Expression - the
original test actually tested expression functionality, not order
functionality
Remove unnecessary "use" statement
Finally remove old "expression" unit test
Respect aliased tables on cloning the gateway
Revert "Respect aliased tables on cloning the gateway"

This reverts commit 0d77c297c3b79b0909669f41f5595997419b7d28.
Select::quantifier() now accepts ExpressionInterface (thx to @turris)
Merge branch 'feature/#6722-db-order-accepts-expressioninterface'

Close #6722
Fix for Zend\Db\TableGateway: Alias for table #6726
Add unit test passing all possible variants of table identifier
Fix spacing
#6726 #6740 - adding `@group` annotation for newly introduced tests
Merge branch 'hotfix/#6726-#6740-tablegateway-table-alias'

Close #6726
Close #6740
* Fix method argument handling of Predicate/Expression to allow single
non-scalar values (e.g. null, Predicate instances) as only parameter
* Fix typo in Predicate/Predicate
Code cosmetics
Code cosmetics
#6849 - simplified `setParameters` call: `array_slice()` was being re-implemented in userland.
#6849 - adding `@group` annotation to newly introduced tests