Learning rate update fixes for GDM models.
Learning rate update fixes for GDM models.

vseledkin/neon,misko/neon,chetan51/neon,FighterLYL/neon,chetan51/neon,lihuanghai/neon,coufon/neon-distributed,shyamalschandra/neon,rupertsmall/neon,lihuanghai/neon,Jokeren/neon,Jokeren/neon,sunclx/neon,nhynes/neon,shyamalschandra/neon,kashif/neon,rupertsmall/neon,Bam4d/neon,DougFirErickson/neon,SalemAmeen/neon,nhynes/neon,sunclx/neon,NervanaSystems/neon,coufon/neon-distributed,nhynes/neon,vseledkin/neon,NervanaSystems/neon,kod3r/neon,nkhuyu/neon,jfsantos/neon,Jokeren/neon,Bam4d/neon,sherjilozair/neon,FighterLYL/neon,zolegus/neon,shyamalschandra/neon,SalemAmeen/neon,misko/neon,DougFirErickson/neon,DougFirErickson/neon,FighterLYL/neon,dongjoon-hyun/neon,kod3r/neon,coufon/neon-distributed,nkhuyu/neon,vseledkin/neon,zolegus/neon,songhan/neon,Bam4d/neon,sunclx/neon,dongjoon-hyun/neon,zolegus/neon,Jokeren/neon,misko/neon,SalemAmeen/neon,dongjoon-hyun/neon,NervanaSystems/neon,NervanaSystems/neon,kod3r/neon,jfsantos/neon,jfsantos/neon,sherjilozair/neon,rupertsmall/neon,chetan51/neon,sherjilozair/neon