Wrong namespace used in error message

[rfelber]

Describe the bug
If a scan will be installed without the corresponding scanType installed in the same namespace, the scan fail with an error like the following:

kubectl describe scan nmap-test-lan-1599724134 -n company-scans:

Name:         nmap-test-lan-1599724134
Namespace:    company-scans
Labels:       attack-surface=external
Annotations:  <none>
API Version:  execution.experimental.securecodebox.io/v1
Kind:         Scan

.....

Status:
  Error Description:  Configured ScanType 'nmap' not found in Scans Namespace. You'll likely need to deploy the ScanType.
  Findings:
    Severities:
  State:  Errored
Events:   <none>

The error message should respect the correct namespace for example in this case:
Configured ScanType 'nmap' not found in 'company-scans' namespace. You'll likely need to deploy the ScanType.