slaprunner: make sure paths don't contain double slash

This is "cleaner", but this will make the hash of software change, maybe
that's not a good idea.
This is because there's a test asserting the path and I felt it was
wrong to assert that part contain // ( but I'm starting to reconsider
this )

software/slaprunner/buildout.hash.cfg

@@ -18,7 +18,7 @@ md5sum = c44a7481bb85e3258128afe3fcf23f44
 
 [template-runner]
 filename = instance-runner.cfg
-md5sum = 58a6f21021279ae52c91813f61cdbdd7
+md5sum = 72fd7bb8f9575bf1e25d13e2d910c3ea
 
 [template-runner-import-script]
 filename = template/runner-import.sh.jinja2

software/slaprunner/instance-runner.cfg

@@ -118,21 +118,21 @@ custom-frontend-url = $${custom-frontend-url-ready-promise:url}
 [directory]
 recipe = slapos.cookbook:mkdirectory
 home = $${buildout:directory}
-etc = $${:home}/etc/
-var = $${:home}/var/
-srv = $${:home}/srv/
-bin = $${:home}/bin/
-tmp = $${:home}/tmp/
+etc = $${:home}/etc
+var = $${:home}/var
+srv = $${:home}/srv
+bin = $${:home}/bin
+tmp = $${:home}/tmp
 
 sshkeys = $${:srv}/sshkeys
-services = $${:etc}/service/
-scripts = $${:etc}/run/
-ssh = $${:etc}/ssh/
-log = $${:var}/log/
-run = $${:var}/run/
-backup = $${:srv}/backup/
-promises = $${:etc}/promise/
-test = $${:etc}/test/
+services = $${:etc}/service
+scripts = $${:etc}/run
+ssh = $${:etc}/ssh
+log = $${:var}/log
+run = $${:var}/run
+backup = $${:srv}/backup
+promises = $${:etc}/promise
+test = $${:etc}/test
 nginx-data = $${:srv}/nginx
 ca-dir = $${:srv}/ssl
 project = $${:srv}/runner/project
@@ -140,8 +140,8 @@ cgi-bin = $${:srv}/cgi-bin
 
 [runnerdirectory]
 recipe = slapos.cookbook:mkdirectory
-home = $${directory:srv}/runner/
-test = $${directory:srv}/test/
+home = $${directory:srv}/runner
+test = $${directory:srv}/test
 project = $${:home}/project
 public = $${:home}/public
 software-root = {{ slapparameter_dict.get('software-root', '$${:home}/software') }}