Updating slf4j to 1.7.21 version
Updating slf4j to 1.7.21 version

kaazing/gateway,nemigaservices/gateway,a-zuckut/gateway,AdrianCozma/gateway,adrian-galbenus/gateway,DoruM/gateway,irina-mitrea-luxoft/gateway,jitsni/gateway,Anisotrop/gateway,vmaraloiu/gateway,jfallows/gateway,justinma246/gateway,nemigaservices/gateway,irina-mitrea-luxoft/gateway,DoruM/gateway,a-zuckut/gateway,AdrianCozma/gateway,mgherghe/gateway,cmebarrow/gateway,nemigaservices/gateway,kaazing/gateway,a-zuckut/gateway,stanculescu/gateway,mjolie/gateway,vmaraloiu/gateway,jitsni/gateway,dpwspoon/gateway,cmebarrow/gateway,cmebarrow/gateway,vmaraloiu/gateway,cmebarrow/gateway,irina-mitrea-luxoft/gateway,jfallows/gateway,adrian-galbenus/gateway,vmaraloiu/gateway,sanjay-saxena/gateway,mgherghe/gateway,danibusu/gateway,mjolie/gateway,mjolie/gateway,danibusu/gateway,stanculescu/gateway,jfallows/gateway,a-zuckut/gateway,irina-mitrea-luxoft/gateway,mjolie/gateway,mgherghe/gateway,justinma246/gateway,stanculescu/gateway,sanjay-saxena/gateway,dpwspoon/gateway,dpwspoon/gateway,adrian-galbenus/gateway,Anisotrop/gateway,danibusu/gateway,kaazing/gateway,Anisotrop/gateway,nemigaservices/gateway,justinma246/gateway,sanjay-saxena/gateway,kaazing/gateway,Anisotrop/gateway,mgherghe/gateway,dpwspoon/gateway,sanjay-saxena/gateway,DoruM/gateway,AdrianCozma/gateway,danibusu/gateway,DoruM/gateway,jitsni/gateway,AdrianCozma/gateway,jitsni/gateway,adrian-galbenus/gateway,stanculescu/gateway,justinma246/gateway,jfallows/gateway