Bug: Fix Tolerations setting for NooBaa in standalone mode

[maratsal]

Currently if you deploy NooBaa in standalone mode with ODF it is not possible to set tolerations by method described on this page - https://access.redhat.com/articles/6408481

The issue because of this commit - 78d3d57 - which wanted to disable Affinity for standalone setup, but also removes tolerations. Please see this piece of code -

ocs-operator/controllers/storagecluster/noobaa_system_reconciler.go

Lines 140 to 144 in 1904024

	if !r.IsNoobaaStandalone {
	placement := getPlacement(sc, "noobaa-core")
	nb.Spec.Tolerations = placement.Tolerations
	nb.Spec.Affinity = &corev1.Affinity{NodeAffinity: placement.NodeAffinity}
	}

Possible solution would be to have it like this:

+	placement := getPlacement(sc, "noobaa-core")
+	nb.Spec.Tolerations = placement.Tolerations
	if !r.IsNoobaaStandalone {
-		placement := getPlacement(sc, "noobaa-core")
-		nb.Spec.Tolerations = placement.Tolerations
		nb.Spec.Affinity = &corev1.Affinity{NodeAffinity: placement.NodeAffinity}
	}