chore: remove problematic mongoose-long dep and use mongodb 3.4 in tests

Author: vkarpov15

.travis.yml

@@ -11,13 +11,13 @@ node_js:
   - "0.10"
   - "iojs"
 before_script:
-  - wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.6.11.tgz
-  - tar -zxvf mongodb-linux-x86_64-2.6.11.tgz
+  - wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.4.23.tgz
+  - tar -zxvf mongodb-linux-x86_64-3.4.23.tgz
   - mkdir -p ./data/db/27017
   - mkdir -p ./data/db/27000
   - printf "\n--timeout 8000" >> ./test/mocha.opts
-  - ./mongodb-linux-x86_64-2.6.11/bin/mongod --fork --dbpath ./data/db/27017 --syslog --port 27017
-  - export PATH=`pwd`/mongodb-linux-x86_64-2.6.11/bin/:$PATH
+  - ./mongodb-linux-x86_64-3.4.23/bin/mongod --fork --dbpath ./data/db/27017 --syslog --port 27017
+  - export PATH=`pwd`/mongodb-linux-x86_64-3.4.23/bin/:$PATH
   - sleep 3
 script:
   - npm test