neo4j_cypher_parser: have p_node, p_rel inherit from p_label_set_container
neo4j_cypher_parser: have p_node, p_rel inherit from p_label_set_container

cben/rhizi,ozFri/rhizi,cben/rhizi,Rhizi/rhizi,yuvadm/rhizi,ozFri/rhizi,tlevine/rhizi,tlevine/rhizi,yuvadm/rhizi,tlevine/rhizi,ozFri/rhizi,shlomif/rhizi,Rhizi/rhizi,shlomif/rhizi,yuvadm/rhizi,cben/rhizi,Rhizi/rhizi,yuvadm/rhizi,tlevine/rhizi,ozFri/rhizi,cben/rhizi,Rhizi/rhizi,shlomif/rhizi,shlomif/rhizi