Syntheses, crystal structures, antioxidant SOD-like properties and in-vitro antimicrobial studies of Cu(II) and Ni (II) complexes with 2-(( E )-(4-bromo-2-chlorophenylimino) methyl)-6-bromo-4-nitrophenol and ( E )-1-(3, 5-dichloro-2-hydroxybenzylidene)-4, 4-dimethylthiosemicarbazide