add resetContexts to param when using QueryFindRequest

[candy02058912]

Problem

when using QueryFindRequest there is no resetContexts paramater

Example query:

Query{
    Query: "reset contexts",
    ResetContexts: true,
    SessionID: "testSession",
}

Original (resetContexts does not exist):

{
    "lang":"en",
    "query":"reset contexts",
    "sessionId":"testSession",
    "v":""
}

Fix

add resetContexts to ToMap so that it will be present when passing a Query that contains resetContexts to QueryFindRequest

After fix:

{
    "lang":"en",
    "query":"reset contexts",
    "resetContexts":"true",
    "sessionId":"testSession",
    "v":""
}