Yang model modifications#12

Merged

zhenggen-xu merged 3 commits intozhenggen-xu:sonic-cfg-mgmtfrom

praveen-li:yang_model_modification_dpb

Dec 11, 2019

Commits on Dec 3, 2019

[sonic-head.yang]: Minor modification for enumeration of ip-type in ACL yang models.
Praveen Chaudhary
committed

Commits on Dec 9, 2019

[sonic-acl.yang]: Present Enumeration similar to config DB.
Praveen Chaudhary
committed
[sonic-head.yang]: Minor update in enumeration
Praveen Chaudhary
committed