Fix class name for PHP7 compatibility

[yobrx]

Hello,

I renamed the class String, Float, Int and Bool to be compatible with PHP7 (reserved keywords)

There is no code changes to be expected if you already use

/** @MongoDB\Field(type="string") */

instead of

/** @MongoDB\String */

in the annotations of an entity.

Thanks,

Yoann

[alcaeus]

Thanks for the PR. It seems you've created this against my fork instead of the original at doctrine/mongodb-odm. Regardless, this was adressed in doctrine#1205 (which does not import the string, bool, int and float annotation classes in PHP 7) and doctrine#1318 (which deprecates all type annotations in favor of @Field(type=...).

[yobrx]

Oups, sorry for that.

I well use the original repository but I had the problem in classes String, Int, Float and Bool, used by annotations.
I did some research and I came on your repository, thinking he had solved the problem. But the problem was well annotations... :s

Thank you very much !