Merge branch 'fix-pbs-nodes-support' into 'master'

PBS statement nodes is not supported on Anselm cluster

See merge request !130

docs.it4i/anselm/job-submission-and-execution.md

@@ -22,6 +22,9 @@ $ qsub -A Project_ID -q queue -l select=x:ncpus=y,walltime=[[hh:]mm:]ss[.ms] job
 
 The qsub submits the job into the queue, in another words the qsub command creates a request to the PBS Job manager for allocation of specified resources. The resources will be allocated when available, subject to above described policies and constraints. **After the resources are allocated the jobscript or interactive shell is executed on first of the allocated nodes.**
 
+!!! note
+    PBS statement nodes (qsub -l nodes=nodespec) is not supported on Anselm cluster.
+
 ### Job Submission Examples
 
 ```console