Remove unused service jobsubmit_all because it's never called by client, clients only call jobsubit@mid now
fixed in sshexec
Mics changes
* changed the signature of submit job in BatchFactory and added implementation LLServer and SlurmServer
* Misc fixes in start and end date handling
fixed job steps handling in SGE, LoadLeveler, Slurm and Torque
tmssed.cpp: accepted slurm 2.5 and 2.6
added missing header
added multisteps job handling for lsf
refactoring: move some code in separate methods
 * fixed coherency about job output
 * refactory simplifying options handling for job submission
 * added method to retrieve job steps info
 * refactoring getJobInfo as special case of getJobStepsInfo
misc fixed for multistep jobs