Nima: Re-enable and fix tests

[tomas-langer]

The following tests are disabled

• Disabled test(s): grpc/metrics/src/test/java/io/helidon/grpc/metrics/GrpcMetricsInterceptorIT.java (Re-enables grpc/metrics/src/test/java/.../*.java #6359)
• Disabled test(s): grpc/metrics/src/test/java/io/helidon/grpc/metrics/MetricsIT.java (Re-enables grpc/metrics/src/test/java/.../*.java #6359)
• Disabled test(s): microprofile/cors/src/test/java/io/helidon/microprofile/cors/AdapterTest.java (Re-enables microprofile/cors/.../AdapterTest.java #6355)
• Disabled test(s): microprofile/metrics/src/test/java/io/helidon/microprofile/metrics/TestDisabledMetrics.java (Enables TestDisabledMetrics.java in microprofile/metrics #6436)
• Disabled test(s): microprofile/metrics/src/test/java/io/helidon/microprofile/metrics/TestExtendedKPIMetrics.java (Deletes TestExtendedKPIMetrics.java from microprofile/metrics as it i… #6437)
• Disabled test(s): microprofile/metrics/src/test/java/io/helidon/microprofile/metrics/TestMetricsOnOwnSocket.java (Re-enables microprofile/metrics/.../TestMetricsOnOwnSocket.java #6356)
• Disabled test(s): microprofile/server/src/test/java/io/helidon/microprofile/server/JerseyPropertiesTest.java (Reenables JerseyPropertiesTest.java in microprofile/server #6594)
• Disabled test(s): microprofile/server/src/test/java/io/helidon/microprofile/server/ServerSseTest.java (4.x: Re-enables microprofile/server/ServerSseTest.java #7626)
• Disabled test(s): nima/openapi/src/test/java/io/helidon/nima/openapi/ServerTest.java (Re-enables ServerTest.java in nima/openapi #6585)
• Disabled test(s): nima/openapi/src/test/java/io/helidon/nima/openapi/TestCors.java (no longer present)
• Disabled test(s): reactive/openapi/src/test/java/io/helidon/reactive/openapi/ServerModelReaderTest.java (no longer present)
• Disabled test(s): reactive/openapi/src/test/java/io/helidon/reactive/openapi/TestCors.java (no longer present)
• Disabled test(s): tests/functional/bookstore/src/test/java/io/helidon/tests/bookstore/MainTest.java #6345
• Disabled test(s): tests/functional/request-scope/src/test/java/io/helidon/tests/functional/requestscope/TenantTest.java ([4.x] Re-enables tests/functional/request-scope/TenantTest.java #7810)
• Disabled test(s): tests/integration/mp-gh-3974/src/test/java/io/helidon/tests/integration/gh3974/Gh3974Test.java [removed: assertThat("Response entity should not be an empty string", response.readEntity(String.class), not(""));] (test is not disabled and runs fine)
• Disabled test(s): tests/integration/mp-ws-services/src/test/java/io/helidon/tests/integration/mp/ws/services/MpServicesTest.java [testJaxrs() -> application is not available on configured socket] (Re-enables tests/integration/.../MpServicesTest.java #6357)
• Disabled test(s): tests/integration/security/path-params/src/test/java/io/helidon/tests/integration/security/pathparams/AdminTest.java (Removes two disabled tests in tests/integration/security/path-params per direction #7832)

[ljnelson]

All tests re-enabled, removed or left alone as appropriate.