Update the release number into 1.7-alpha.b1434
Update the release number into 1.7-alpha.b1434

srapisarda/ontop,ghxiao/ontop-spatial,clarkparsia/ontop,ghxiao/ontop-spatial,srapisarda/ontop,srapisarda/ontop,eschwert/ontop,ontop/ontop,eschwert/ontop,ontop/ontop,eschwert/ontop,clarkparsia/ontop,ConstantB/ontop-spatial,ConstantB/ontop-spatial,ConstantB/ontop-spatial,ConstantB/ontop-spatial,clarkparsia/ontop,srapisarda/ontop,ghxiao/ontop-spatial,ontop/ontop,ontop/ontop,ontop/ontop,ghxiao/ontop-spatial,eschwert/ontop