Define gerrit_root in copy-plugin-deps
The copy-plugin-deps role relied on an undefined variable "gerrit_root".
This caused plugins such as delete-project, which have external deps,
to fail the gerrit-plugin-build job. Correct this by defining the variable
as expected.
Change-Id: I68ef0074b69fe3f2e9a7381eb9e9f9984d4eac11
diff --git a/roles/prepare-gerrit-repos/defaults/main.yaml b/roles/prepare-gerrit-repos/defaults/main.yaml
index 8a6c340..0ba7b8a 100644
--- a/roles/prepare-gerrit-repos/defaults/main.yaml
+++ b/roles/prepare-gerrit-repos/defaults/main.yaml
@@ -3,3 +3,4 @@
gerrit: ''
jgit: modules/jgit
'zuul/jobs': ''
+gerrit_root: "{{ ansible_user_dir }}/{{ zuul.projects[gerrit_project_name].src_dir }}"
