smc-ansible/all-install: adding postgresql client and cleaning up the long list of package names for the user-relevant software of compute nodes
smc-ansible/all-install: adding postgresql client and cleaning up the long list of package names for the user-relevant software of compute nodes

sagemathinc/smc,DrXyzzy/smc,DrXyzzy/smc,tscholl2/smc,tscholl2/smc,DrXyzzy/smc,tscholl2/smc,tscholl2/smc,DrXyzzy/smc,sagemathinc/smc,sagemathinc/smc,tscholl2/smc,sagemathinc/smc