Add demo/grouper tests

Although the tests are quite advanced, they are not really complete yet.
Most notably, group membership update in LDAP is not checked now.
We should include running Trigger Scanner in these tests eventually.

Jenkinsfile

@@ -61,7 +61,7 @@ pipeline {
                         sh '(cd demo/simple ; bats tests ) 2>&1 | tee -a debug ; test ${PIPESTATUS[0]} -eq 0'
                         sh '(cd demo/shibboleth ; bats tests ) 2>&1 | tee -a debug ; test ${PIPESTATUS[0]} -eq 0'
                         sh '(cd demo/postgresql ; bats tests ) 2>&1 | tee -a debug ; test ${PIPESTATUS[0]} -eq 0'
-                        //sh '(cd demo/complex ; bats tests ) 2>&1 | tee -a debug ; test ${PIPESTATUS[0]} -eq 0'
+                        sh '(cd demo/grouper ; bats tests ) 2>&1 | tee -a debug ; test ${PIPESTATUS[0]} -eq 0'
                     } catch (error) {
                         def error_details = readFile('./debug')
                         def message = "BUILD ERROR: There was a problem testing ${imagename}:${tag}. \n\n ${error_details}"

demo/grouper/midpoint-objects/objectTemplates/template-user.xml

@@ -7,7 +7,7 @@
   -->
 
 <objectTemplate xmlns="http://midpoint.evolveum.com/xml/ns/public/common/common-3" xmlns:q="http://prism.evolveum.com/xml/ns/public/query-3" oid="8098b124-c20c-4965-8adf-e528abedf7a4">
-    <name>User Template</name>
+    <name>template-user</name>
     <mapping>
         <strength>strong</strength>
         <source>