Fixes #738: servicediscovery (common)namespace READY=FALSE

[haarchri]

Description of your changes

Fixes #738
if description is empty the status is READY=FALSE because of lateInited = true,
also removed description in examples because it's not required

before the fix:

NAME                                                                                      READY   SYNCED   EXTERNAL-NAME
privatednsnamespace.servicediscovery.aws.crossplane.io/example-privatednsnamespace        True    True     ns-ngfbsrd3zfnp3qnj
privatednsnamespace.servicediscovery.aws.crossplane.io/testnamespace.svc.cluster.local    False   True     ns-oslzgdargwixvklp
privatednsnamespace.servicediscovery.aws.crossplane.io/testnamespace2-svc-cluster-local   False   True     ns-vbcc5n6l5wel5vfr

after the fix:

NAME                                                                                      READY   SYNCED   EXTERNAL-NAME
privatednsnamespace.servicediscovery.aws.crossplane.io/example-privatednsnamespace        True    True     ns-ngfbsrd3zfnp3qnj
privatednsnamespace.servicediscovery.aws.crossplane.io/testnamespace.svc.cluster.local    True    True     ns-oslzgdargwixvklp
privatednsnamespace.servicediscovery.aws.crossplane.io/testnamespace2-svc-cluster-local   True    True     ns-vbcc5n6l5wel5vfr

I have:

• Read and followed Crossplane's contribution process.
• Run make reviewable test to ensure this PR is ready for review.

How has this code been tested

make reviewable
18:29:28 [ OK ] go test unit-tests

create & delete multiple (common)namespaces :)

[muvaf]

LGTM! Just a small nitpick :)

[haarchri]

@muvaf can we go here ? thanks