slaprunner: correctly patch software release path on import

usually, the software release path is :
in a web runner : /srv/slapgrid/slappartXX/srv/runner/project/buildout.cfg
in a test node : /srv/slapgrid/slappartX/srv/testnode/xx/inst/test0-XX/srv/runner/project/buldout.cfg

the previous regex was replacing in all slappartX and test0-X by the new test0-Y
which of course would make an existing path : /srv/slapgrid/test0-Y/.../test0-Y/...

This commit only replace the latest occurence in order to have
compatible code in the "normal" case, and in the test nodes

software/slaprunner/buildout.hash.cfg

@@ -22,7 +22,7 @@ md5sum = e12255a8c946b3eb8c6373fff481339f
 
 [template-runner-import-script]
 filename = template/runner-import.sh.jinja2
-md5sum = 92ac3f6982dec97e3b2df90f97111bd3
+md5sum = 3a0bca6a1091d654bae81b015cde3eb8
 
 [instance-runner-import]
 filename = instance-runner-import.cfg.in

software/slaprunner/template/runner-import.sh.jinja2

@@ -149,7 +149,19 @@ fi
 # XXX hardcoded
 PARTITION=$(basename $HOME)
 OLD_SOFTWARE_RELEASE=$(db_query "select software_release from partition11 where reference='slappart0';")
-SOFTWARE_RELEASE=$(echo "$OLD_SOFTWARE_RELEASE" | sed 's/\/\(slappart\|test0-\)[0-9][0-9]*\//\/'"$PARTITION"'\//')
+SOFTWARE_RELEASE=$({{ sys.executable }} - $OLD_SOFTWARE_RELEASE $PARTITION <<EOF
+if 1:
+  import os, re, sys
+
+  # We want to replace the last occurence only
+  old_software_release, partition = sys.argv[1], sys.argv[2]
+  for match in re.finditer("(slappart|test0-)[0-9][0-9]", old_software_release):
+    start, end = match.start(), match.end()
+
+  print old_software_release[:start] + partition + old_software_release[end:]
+EOF
+)
+
 db_query "update partition11 set software_release='$SOFTWARE_RELEASE' where software_release NOT NULL;"
 db_query "update software11 set url='$SOFTWARE_RELEASE' where url='$OLD_SOFTWARE_RELEASE';" || db_query "delete from software11 where url='$OLD_SOFTWARE_RELEASE';"
 # Change slapproxy database to have all instances stopped