Added School as a role for admin api

[radhay-samagra]

Description

Added school in the roles list for Admin APIs

Changes

Added school in the role decorator in admin controller

How to test

Describe the steps required to test the changes proposed in the pull request.

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[coveralls]

Pull Request Test Coverage Report for Build 2662947032

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 25.978%

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Totals
Change from base Build 2327179044:	0.0%
Covered Lines:	352
Relevant Lines:	1312

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💛 - Coveralls