Property creation with custom Doctrine types

[kgrozdanovski]

Enables creating classes with custom types mapped through doctrine\dbal in doctrine.yaml.

Positively tested with the make:entity command with custom types provided by longitude-one/doctrine-spatial extension and doctrine\dbal.

Note that this partially addresses #1166 however does not fix the error with creating blob types. That issue is properly addressed by #1167 and this PR only complements that one.

Also note this PR is similar to the more extensive #1021.

Fixes #1002.

[k0d3r1s]

this is exactly what I need.
any movement about merging this? @weaverryan