go.mod: replace non-existent tag

The openshift/api project deleted their tags at some point, because of
which we get the following error for go commands:

```
go:
github.com/openshift/api@v3.9.1-0.20190924102528-32369d4db2ad+incompatible:
invalid pseudo-version: preceding tag (v3.9.0) not found
```

There is at least one more project which is referencing the tag(Noobaa)
which makes it harder to change the require line right now. Therefore, I
have modified the requirement through a replace line.

For more information refer to
openshift/api#456

Signed-off-by: Raghavendra Talur <raghavendra.talur@gmail.com>

go.mod

@@ -32,6 +32,7 @@ require (
 // Pinned to kubernetes-1.17.4
 replace (
 	github.com/Azure/go-autorest => github.com/Azure/go-autorest v13.3.2+incompatible // Required by OLM
+	github.com/openshift/api => github.com/openshift/api v0.0.0-20190924102528-32369d4db2ad
 	k8s.io/api => k8s.io/api v0.17.4
 	k8s.io/apiextensions-apiserver => k8s.io/apiextensions-apiserver v0.17.4
 	k8s.io/apimachinery => k8s.io/apimachinery v0.17.4

go.sum

@@ -906,6 +906,7 @@ github.com/opencontainers/runtime-spec v0.1.2-0.20190507144316-5b71a03e2700/go.m
 github.com/opencontainers/runtime-spec v1.0.0/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/opencontainers/runtime-tools v0.0.0-20181011054405-1d69bd0f9c39/go.mod h1:r3f7wjNzSs2extwzU3Y+6pKfobzPh+kKFJ3ofN+3nfs=
 github.com/opencontainers/selinux v1.3.1-0.20190929122143-5215b1806f52/go.mod h1:+BLncwf63G4dgOzykXAxcmnFlUaOlkDdmw/CqsW6pjs=
+github.com/openshift/api v0.0.0-20190924102528-32369d4db2ad/go.mod h1:dh9o4Fs58gpFXGSYfnVxGR9PnV53I8TW84pQaJDdGiY=
 github.com/openshift/api v0.0.0-20200205133042-34f0ec8dab87/go.mod h1:fT6U/JfG8uZzemTRwZA2kBDJP5nWz7v05UHnty/D+pk=
 github.com/openshift/api v3.9.1-0.20190424152011-77b8897ec79a+incompatible/go.mod h1:dh9o4Fs58gpFXGSYfnVxGR9PnV53I8TW84pQaJDdGiY=
 github.com/openshift/api v3.9.1-0.20190924102528-32369d4db2ad+incompatible h1:6il8W875Oq9vycPkRV5TteLP9IfMEX3lyOl5yN+CtdI=