moving read preference from session to transaction

Author: jdaigneau5

src/controller/registry-org.controller/registry-org.controller.js

@@ -134,7 +134,7 @@ async function getOrg (req, res, next) {
  */
 async function createOrg (req, res, next) {
   try {
-    const session = await mongoose.startSession({ causalConsistency: false, readPreference: 'primary' })
+    const session = await mongoose.startSession({ causalConsistency: false })
     const repo = req.ctx.repositories.getBaseOrgRepository()
     const body = req.ctx.body
     const isSecretariat = await repo.isSecretariatByShortName(req.ctx.org, { session })
@@ -146,7 +146,7 @@ async function createOrg (req, res, next) {
     }
 
     try {
-      session.startTransaction()
+      session.startTransaction({ readPreference: 'primary' })
       const result = repo.validateOrg(body, { session })
       if (!result.isValid) {
         logger.error(JSON.stringify({ uuid: req.ctx.uuid, message: 'CVE JSON schema validation FAILED.' }))