slapos-sr-testing: Pick up recurls

It's fetched from the upstream repository with well known working revision.

software/slapos-sr-testing/software.cfg

@@ -292,11 +292,22 @@ initialization =
   print("Error: attempt to use system python2", file=sys.stderr)
   sys.exit(2)
 
+[recurls-repository]
+<= git-clone-repository
+repository = https://lab.nexedi.com/luke/recurls.git
+revision = 1797eb42c2c1a8efad0f80bd331a01f5d53f83b5
+
+[recurls-setup]
+<= setup-develop-egg
+egg = recurls
+setup = ${recurls-repository:location}
+
 [python-interpreter]
 eggs +=
   ${lxml-python:egg}
   ${python-PyYAML:egg}
   ${slapos.core-setup:egg}
+  ${recurls-setup:egg}
   ${pillow-python:egg}
   ${pycurl:egg}
   caucase
@@ -448,6 +459,9 @@ tests =
   upgrade_erp5 ${slapos.test.upgrade_erp5-setup:setup}
 
 [versions]
+# recurls are under development
+recurls =
+
 # slapos.core is used from the clone always
 slapos.core =