YUM repo: fix definition of YUM_EMI_SNAPSHOT_DATE
YUM repo: fix definition of YUM_EMI_SNAPSHOT_DATE

- Because of a typo, explicit definition ignored previously.

victor-mendoza/template-library-grid,Pansanel/template-library-grid,victor-mendoza/template-library-grid,jouvin/template-library-grid,jouvin/template-library-grid,victor-mendoza/template-library-grid,Pansanel/template-library-grid,jouvin/template-library-grid,Pansanel/template-library-grid