erp5testnode: Shorten partition container path

erp5testnode runs test inside of:

/srv/slapgrid/slappartXY/srv/testnode

Since it runs SlapOS profile tests, they run services in:

/srv/slapgrid/slappartXY/srv/testnode/ZZZ/inst/test0-0/tmp/inst/

Shortening it to:

/srv/slapgrid/slappartXY/srv/t/ZZZ/inst/test0-0/tmp/inst/

minimises chance to reach limit of maximum path, often hit by sockets.

software/erp5testnode/buildout.hash.cfg

@@ -18,4 +18,4 @@ md5sum = 307663d73ef3ef94b02567ecd322252e
 
 [template-default]
 filename = instance-default.cfg
-md5sum = de56145079f33f78d6bcf140f6caf2f3
+md5sum = 3528ca76c2a5f9e7aa306788c5117ca0

software/erp5testnode/instance-default.cfg

@@ -188,7 +188,7 @@ promises = $${rootdirectory:etc}/promise
 [directory]
 recipe = slapos.cookbook:mkdirectory
 slapos = $${rootdirectory:srv}/slapos
-testnode = $${rootdirectory:srv}/testnode
+testnode = $${rootdirectory:srv}/t
 test-suite = $${rootdirectory:srv}/test_suite
 log = $${basedirectory:log}/testnode
 run = $${basedirectory:run}/testnode