Upgrade CSI spec to 1.1.0

[leakingtapan]

/cc @bertinatto

This unblocks volume resizing.

[k8s-ci-robot]

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[coveralls]

Pull Request Test Coverage Report for Build 572

• 0 of 6 (0.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.3%) to 65.106%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/driver/controller.go	0	3	0.0%
pkg/driver/node.go	0	3	0.0%

Totals
Change from base Build 571:	-0.3%
Covered Lines:	987
Relevant Lines:	1516

---

💛 - Coveralls

[bertinatto]

Thanks, @leakingtapan.

Can't merge now because of failing tests, but it's OK if you don't want to fix it because I already imported this in my working branch.

[bertinatto]

/retest

[leakingtapan]

Coverage drop is due to CSI Spec upgrade.

[leakingtapan]

The failed test was due to:

�[91m�[1mSummarizing 2 Failures:�[0m

�[91m�[1m[Fail] �[0m�[90m[ebs-csi-e2e] [single-az] Dynamic Provisioning �[0m�[91m�[1m[It] should create a volume on demand with volumeType "sc1" and fsType "ext3" �[0m
�[37m/home/prow/go/src/github.com/kubernetes-sigs/aws-ebs-csi-driver/tests/e2e/testsuites/testsuites.go:313�[0m

�[91m�[1m[Fail] �[0m�[90m[ebs-csi-e2e] [single-az] Dynamic Provisioning �[0m�[91m�[1m[It] should create a volume on demand with volumeType "sc1" and fsType "ext2" �[0m
�[37m/home/prow/go/src/github.com/kubernetes-sigs/aws-ebs-csi-driver/tests/e2e/testsuites/testsuites.go:509�[0m

�[1m�[91mRan 35 of 37 Specs in 1562.276 seconds�[0m
�[1m�[91mFAIL!�[0m -- �[32m�[1m33 Passed�[0m | �[91m�[1m2 Failed�[0m | �[33m�[1m0 Pending�[0m | �[36m�[1m2 Skipped�[0m

It's unrelated to this change. We will revisit all the flaky tests once #192 is done.