Seed jobs can not clone repositories which contain lfs files.

We now add GitLFS pull after checkout behaviour in order to support also repositories which are relying on Git LFS.

Closes jenkinsci#482

pkg/configuration/user/seedjobs/seedjobs.go

@@ -79,6 +79,7 @@ import hudson.plugins.git.BranchSpec;
 import hudson.plugins.git.GitSCM;
 import hudson.plugins.git.SubmoduleConfig;
 import hudson.plugins.git.extensions.impl.CloneOption;
+import hudson.plugins.git.extensions.impl.GitLFSPull;
 import javaposse.jobdsl.plugin.ExecuteDslScripts;
 import javaposse.jobdsl.plugin.LookupStrategy;
 import javaposse.jobdsl.plugin.RemovedJobAction;
@@ -92,7 +93,10 @@ def jobDslSeedName = "{{ .ID }}-{{ .SeedJobSuffix }}";
 def jobRef = jenkins.getItem(jobDslSeedName)
 
 def repoList = GitSCM.createRepoList("{{ .RepositoryURL }}", "{{ .CredentialID }}")
-def gitExtensions = [new CloneOption(true, true, ";", 10)]
+def gitExtensions = [
+	new CloneOption(true, true, ";", 10),
+	new GitLFSPull()
+]
 def scm = new GitSCM(
         repoList,
         newArrayList(new BranchSpec("{{ .RepositoryBranch }}")),