build: Update to latest slf4j 1.7 api
build: Update to latest slf4j 1.7 api

Signed-off-by: BJ Hargrave <3d26bb3930946e3370762d769a073cece444c2d8@bjhargrave.com>

seanbright/bndtools,timothyjward/bndtools,seanbright/bndtools,bndtools/bndtools,psoreide/bnd,seanbright/bndtools,seanbright/bndtools,psoreide/bnd,psoreide/bnd,timothyjward/bndtools,bndtools/bndtools,timothyjward/bndtools,bndtools/bndtools,timothyjward/bndtools,bndtools/bndtools,timothyjward/bndtools,bndtools/bndtools,seanbright/bndtools