Implementation of inTransaction() in all Zend\Db\Adapter\Drivers

[ghost]

I wanted to add this pull request to Issue #5744

[Maks3w]

@ralphschindler Should this method be added to ConnectionInterface?

[ralphschindler]

That would be a backwards incompatible change I think (to add it to the interface).

[Maks3w]

Yes, It is.For 2.3 then?

[ralphschindler]

I think adding methods to interfaces would need to wait till 3.0. Anyone that has written their own driver at this point should have the expectation that it will work throughout the 2.x series.

This PR, on the other hand, is perfectly fine to include in 2.3

[weierophinney]

@ralphschindler Another possibility for adding methods is to add new interfaces, and make the default implementations implement those. Prior to calling any of the new methods, you check if the object implements the given interface. (We've done this many times now in the ZF2 lifecycle).

Based on your advice, marking for 2.3.0 and assigning to you, @ralphschindler .

[ralphschindler]

Merged to develop