Reduced displayed error messages (coscine/issues#854)

src/OrganizationDeployer/getOrganizations.ps1

@@ -6,20 +6,22 @@ $gitlab_token = & $fullPath kv get "coscine/global/gitlabtoken"
 
 Push-Location $PSScriptRoot
 
+$organizationsPath = 'organizations'
+# Twice remove, because of: https://stackoverflow.com/questions/7909167/how-to-quietly-remove-a-directory-with-content-in-powershell#comment10316056_7909195
+If(Test-Path $organizationsPath) { Remove-Item -LiteralPath $organizationsPath -Force -Recurse }
+If(Test-Path $organizationsPath) { Remove-Item -LiteralPath $organizationsPath -Force -Recurse }
+
 git clone https://gitlab-ci-token:$gitlab_token@git.rwth-aachen.de/coscine/organizations.git
 
 cd organizations
 
 $pagebranch = & $fullPath kv get 'coscine/local/organizationdeployer/branch'
 
-if (!$pagebranch) {
-	$pagebranch = 'master';
+if ($pagebranch -And $pagebranch -ne 'master' ) {
+	git checkout $pagebranch
+	git pull
 }
 
-git checkout $pagebranch
-
-git pull
-
 cd ..
 
 $path = '/voc'