Small simplifications to mapping validation.#39777

Merged

jtibshirani merged 2 commits intoelastic:masterfrom jtibshirani:mapper-merge-validator

Mar 7, 2019

+14-63

Commits on Mar 6, 2019

Remove the type argument in validateMapperStructure.
jtibshirani
committed
Remove unnecessary checks now that there is a single mapping definition.
jtibshirani
committed