fix LD_LIBRARY_PATH handling in srun_prolog
fix LD_LIBRARY_PATH handling in srun_prolog

uwsampa/grappa,uwsampa/grappa,buaasun/grappa,uwsampa/grappa,buaasun/grappa,buaasun/grappa,alexfrolov/grappa,uwsampa/grappa,alexfrolov/grappa,uwsampa/grappa,alexfrolov/grappa,uwsampa/grappa,uwsampa/grappa,buaasun/grappa,alexfrolov/grappa,alexfrolov/grappa,alexfrolov/grappa,buaasun/grappa,buaasun/grappa,buaasun/grappa,alexfrolov/grappa