Added multiple region support for quota

[anujbansal16]

Feature: HCPCFS-2886

This PR enhance the broker to support multiple regions. Enhancements are listed below:

• Extending the broker routes to support the region as a url parameter.
  Example: https://example-broker.com/region/eu10/v2/...
• Based on the region provided as a part of url, we extract the particular credential for quota validations.
• Tagging each sfserviceinstance based the the region so that it could be determined which region the service instance is from.

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/177090005

The labels on this github issue will be updated when the story is started.

[codecov]

Codecov Report

Merging #1263 (32fd23a) into master (ed609f0) will increase coverage by 0.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1263      +/-   ##
==========================================
+ Coverage   71.52%   71.65%   +0.13%     
==========================================
  Files          44       44              
  Lines        3817     3817              
==========================================
+ Hits         2730     2735       +5     
+ Misses        769      765       -4     
+ Partials      318      317       -1     

[coveralls]

Pull Request Test Coverage Report for Build 5200

• 40 of 43 (93.02%) changed or added relevant lines in 11 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.004%) to 89.153%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
broker/applications/osb-broker/src/api-controllers/ServiceBrokerApiController.js	5	6	83.33%
broker/applications/osb-broker/src/api-controllers/middleware/index.js	1	2	50.0%
broker/data-access-layer/quota/src/k8s-platform-quota-manager/K8SPlatformQuotaManager.js	0	1	0.0%

Files with Coverage Reduction	New Missed Lines	%
broker/data-access-layer/quota/src/k8s-platform-quota-manager/K8SPlatformQuotaManager.js	1	54.55%

Totals
Change from base Build 5174:	0.004%
Covered Lines:	9446
Relevant Lines:	10224

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💛 - Coveralls

[jayeshjk]

LGTM