fix tbg variable substitution

[psychocoderHPC]

close #695

• delete command that removed variable definitions someThing=... from the template file
• *.tpl files: move batch system commands above (the now still existing) bash commands

Reason for *.tpl change:
Batch system commands must be defined before any bash command. Before this pull request tbg deleted all variable definitions in the template file and therefore fulfilled the batch system restriction.

Removing variable assignments (and due to that defined variables in .start) with tbg results in side effects and limited functionality for the template file (since those runtime variables will be missing in the .start script).

Old *.tpl files are not compatible to this pull request

[psychocoderHPC]

This bug fix need that we change all *.tpl files before the first batch system command e.g. #PBS -q queueName it is not allowed to place any bash commands.

[psychocoderHPC]

updated this pull request

[psychocoderHPC]

UPDATE: I have not seen in my tests that this pull request now creates error's during the job start. This is not critical but should be solved.

/var/spool/torque/mom_priv/jobs/976719.hypnos3.SC: line 47: [: -gt: unary operator expected
/var/spool/torque/mom_priv/jobs/976719.hypnos3.SC: line 53: ( TBG_tasks + TBG_gpusPerNode -1 ) / TBG_gpusPerNode: division by 0 (error token is "TBG_gpusPerNode")

[psychocoderHPC]

@ComputationalRadiationPhysics/picongpu-developers This pull request breaks the old template files. Please use the new *.tpl files!