adds support for insert id for postgres

[developernaren]

Adds support for insert id in postgres

Changes made

• For some reason the composer.lock does not have phpunit so did a composer install to update the composer
• Changed the container names to be more drift specific because it was conflicting with my containers in my local docker
• Extracted insert for all the drivers into their own class

[developernaren]

Circle Ci check is failing the tests. I had the same issue when I first ran the tests. It gave me an error table test.test does not exits. The I looked around in the test code. I changed the resetInfrastructure to createInfrastucture it worked and it started working in other consecutive test runs. I am not exactly sure what the issue is.

[mmoreram]

??

[mmoreram]

I'm not sure the meaning of that removed line

[mmoreram]

Tests are not passing

• I'm not sure why EmptyDoctrineMysqlDriver should stop extending AbstractMySQLDriver
• With this new implementation, when inserting an item in a non existing table, tests fail, basically because the query have RETURNING " without fields.
• Once this last thing is solved, then tests are failing on line 556 - Failed asserting that null matches expected 1. - and sometimes the line 326

I'm fixing all these problems and I will update the PR and ping you.

Thanks!

[mmoreram]

This method is already defined for implementation in the Driver interface. Because this class is abstract, you don't have to implement it.

[mmoreram]

If all drivers have to extend this AbstractDriver, then the interface can be implemented directly in this abstract class and not in the specific classes (the contract is implicit when you extend)

[mmoreram]

@developernaren I've completed your PR here - #19