Add quote to memdbJSON (#951)
Add quote to memdbJSON (#951)

memdbJSON has to be quoted, otherwise the value gets interpreted as nil
and causes an error.


https://pantheon.corp.google.com/cloud-build/builds;region=global/6a5d538a-44a4-4e06-9d38-ff50ae6ae919;step=0?mods=-monitoring_api_staging&project=datcom-ci

Co-authored-by: Alex Chen <b569f4b903ae64f3956155e9038aae5b47890bf4@google.com>
datacommonsorg/mixer,datacommonsorg/mixer,datacommonsorg/mixer