edge: Fix flaky `[It] creates a home directory` test

[butonic]

the integration test for storage providers: [It] creates a home directory seems to be flaky.

It failed in https://drone.cernbox.cern.ch/cs3org/reva/6217/5/3

• [FAILED] [11.192 seconds]
182 | gateway
183 | /drone/src/tests/integration/grpc/gateway_storageprovider_test.go:52
184 | [It] creates a home directory
185 | /drone/src/tests/integration/grpc/gateway_storageprovider_test.go:130
186 |  
187 | Expected
188 | <rpcv1beta1.Code>: 8
189 | to equal
190 | <rpcv1beta1.Code>: 1
191 | In [It] at: /drone/src/tests/integration/grpc/gateway_storageprovider_test.go:136

But restarting the job passed in https://drone.cernbox.cern.ch/cs3org/reva/6218/5/3