fix chaotic-openapi: inproper serialization for single body requests - #1340

fix chaotic-openapi: inproper serialization for single body requests#1340

alex-aparin wants to merge 7 commits into

userver-framework:developuserver-framework/userver:developfrom

alex-aparin:fix/openapi_clientalex-aparin/userver:fix/openapi_clientCopy head branch name to clipboard