Fix #3803 set roles in resource_key

[kavya498]

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Relates OR Closes #3803

[hkantare]

Can you add testcase results

[kavya498]

Test results

=== RUN   TestAccIBMResourceKeyDataSource_basic
--- PASS: TestAccIBMResourceKeyDataSource_basic (111.11s)
=== RUN   TestAccIBMResourceKeyDataSource_mostrecent
--- PASS: TestAccIBMResourceKeyDataSource_mostrecent (82.82s)
=== RUN   TestAccIBMResourceKey_Basic
--- PASS: TestAccIBMResourceKey_Basic (85.08s)
=== RUN   TestAccIBMResourceKey_With_Tags
--- PASS: TestAccIBMResourceKey_With_Tags (93.95s)
=== RUN   TestAccIBMResourceKey_Parameters
--- PASS: TestAccIBMResourceKey_Parameters (71.09s)
=== RUN   TestAccIBMResourceKey_WithCustomRole
--- PASS: TestAccIBMResourceKey_WithCustomRole (66.32s)
PASS
ok  	github.com/IBM-Cloud/terraform-provider-ibm/ibm/service/resourcecontroller	511.313s