Add GetRole function to Role Resource

[fdmsantos]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 627

• 0 of 4 (0.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.2%) to 95.918%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/Identity/v3/Service.php	0	1	0.0%
src/Identity/v3/Models/Role.php	0	3	0.0%

Totals
Change from base Build 624:	-0.2%
Covered Lines:	1692
Relevant Lines:	1764

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 629

• 4 of 4 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.009%) to 96.145%

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Totals
Change from base Build 624:	0.009%
Covered Lines:	1696
Relevant Lines:	1764

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💛 - Coveralls