[3rdparty] Bump to doctrine/dbal-2.7.2

[rullzer]

Requires:

• Bump doctrine/dbal to 2.6.3 3rdparty#219
• Bump doctrine/dbal to 2.7.2 3rdparty#224
• rebase

[rullzer]

Seems this fails on

server/tests/lib/DB/OCPostgreSqlPlatformTest.php

Line 41 in da3004b

public function testAlterBigint() {

@nickvergessen @icewind1991 can one of you with postgres knowledge have a look?

[nickvergessen]

It's using BIGSERIAL instead of BIGINT, our hack was removed.

[nickvergessen]

Basically the test was added to prevent exactly this from happening.
The column is a Bigserial now instead of Bigint and the column is default value is being dropped instead of being kept.

But since we update doctrine, if we go straight to 2.7.1 we can drop it aparently: owncloud/core#31059

[rullzer]

I did the tiny steps because diretion to 2.9 failed hard.
once this is in we can bump to 2.7

[rullzer]

but lets see about 2.7 tomorrow

[rullzer]

Bumped it to 2.7.2 Lets see

[rullzer]

@nickvergessen this is 2.7.2 now. Could you have another look?

[nickvergessen]

Well I guess now we need to delete the test, just like OC did?

[rullzer]

@nickvergessen actually CI seems to be happy

[rullzer]

Added patch

[rullzer]

Ready for review :D