Store the storprep bootstrap tool in /tmp

Change-Id: Idc483c23fc83b9eb31f800ee5c9607e64e67ae31
diff --git a/playbooks/sp-init.yaml b/playbooks/sp-init.yaml
index 56d5729..274c22b 100644
--- a/playbooks/sp-init.yaml
+++ b/playbooks/sp-init.yaml
@@ -18,6 +18,9 @@
 
 - hosts: localhost
   connection: local
+  vars:
+    host_id: "{{ hostvars['tempest']['nodepool']['external_id'] }}"
+    storprep_filename: "/tmp/storprep-bootstrap-{{ host_id }}.sh"
   tasks:
     - name: ctrl-sp-whoami-hostname
       shell:
@@ -25,11 +28,15 @@
 
     - name: ctrl-sp-fetch-storprep
       shell:
-        cmd: curl -C - -o storprep-bootstrap.sh -- https://spfactory.storpool.com/sp-osci/storprep-bootstrap-sh.txt
+        cmd: curl -C - -o '{{ storprep_filename }}' -- https://spfactory.storpool.com/sp-osci/storprep-bootstrap-sh.txt
 
     - name: ctrl-sp-run-storprep
       shell:
-        cmd: sh storprep-bootstrap.sh -- -n lab-charmed-testing-storage -s lab-vlan400 -- {{ hostvars['tempest']['nodepool']['external_id'] }}
+        cmd: sh '{{ storprep_filename }}' -- -n lab-charmed-testing-storage -s lab-vlan400 -- {{ host_id }}
+
+    - name: ctrl-sp-rm-storprep
+      shell:
+        cmd: rm -- '{{ storprep_filename }}'
 
 - hosts: all
   tasks: