Testcase fails with panic issue during RetryOnErr call

logger := ctx.Value("logger").(*logrus.Entry) 

=== RUN   TestNegBucketEdit

panic: interface conversion: interface {} is nil, not *logrus.Entry [recovered]

        panic: interface conversion: interface {} is nil, not *logrus.Entry

goroutine 49 [running]:

testing.tRunner.func1(0xc4204501e0)

        /usr/local/opt/go/libexec/src/testing/testing.go:742 +0x567

panic(0x22ff9a0, 0xc420472a40)

        /usr/local/opt/go/libexec/src/runtime/panic.go:505 +0x24a

github.com/couchbase/couchbase-operator/pkg/util/retryutil.RetryOnErr.func1(0x100000008, 0x24b5358, 0xc420652140)

        /Users/ashwin/go/src/github.com/couchbase/couchbase-operator/pkg/util/retryutil/retryutil.go:67 +0x26c

github.com/couchbase/couchbase-operator/pkg/util/retryutil.Retry(0x25b0580, 0xc4200d0048, 0x12a05f200, 0x5, 0xc42040ad80, 0x0, 0x0)

        /Users/ashwin/go/src/github.com/couchbase/couchbase-operator/pkg/util/retryutil/retryutil.go:39 +0xbe

github.com/couchbase/couchbase-operator/pkg/util/retryutil.RetryOnErr(0x25b0580, 0xc4200d0048, 0x12a05f200, 0x5, 0x243f37e, 0x13, 0x2437ed8, 0xc, 0xc4200e9920, 0x2596720, ...)

        /Users/ashwin/go/src/github.com/couchbase/couchbase-operator/pkg/util/retryutil/retryutil.go:61 +0x13c

github.com/couchbase/couchbase-operator/test/e2e/e2eutil.VerifyBucketInfo(0xc4204501e0, 0xc4200adb00, 0x5, 0x2432bf3, 0x7, 0x24357e3, 0xa, 0x243502c, 0x9, 0xc42000e048, ...)

        /Users/ashwin/go/src/github.com/couchbase/couchbase-operator/test/e2e/e2eutil/couchbase_util.go:314 +0x276

github.com/couchbase/couchbase-operator/test/e2e.TestNegBucketEdit(0xc4204501e0)

        /Users/ashwin/go/src/github.com/couchbase/couchbase-operator/test/e2e/bucket_test.go:588 +0xae3

testing.tRunner(0xc4204501e0, 0x24b2e98)

        /usr/local/opt/go/libexec/src/testing/testing.go:777 +0x16e

created by testing.(*T).Run

        /usr/local/opt/go/libexec/src/testing/testing.go:824 +0x565