Add 3.6 testing suites in travis

Author: UnderGreen

.travis.yml

@@ -8,6 +8,10 @@ python:
   - "2.7"
   - "3.6"
 env:
+  - >
+    DISTRIBUTION=ubuntu-upstart
+    DIST_VERSION=14.04
+    MONGODB_VERSION=3.6
   - >
     DISTRIBUTION=ubuntu-upstart
     DIST_VERSION=14.04
@@ -19,19 +23,27 @@ env:
   - >
     DISTRIBUTION=centos
     DIST_VERSION=6-builded
-    MONGODB_VERSION=3.2
+    MONGODB_VERSION=3.6
   - >
     DISTRIBUTION=centos
     DIST_VERSION=6-builded
     MONGODB_VERSION=3.4
   - >
     DISTRIBUTION=centos
-    DIST_VERSION=7-builded
+    DIST_VERSION=6-builded
     MONGODB_VERSION=3.2
+  - >
+    DISTRIBUTION=centos
+    DIST_VERSION=7-builded
+    MONGODB_VERSION=3.6
   - >
     DISTRIBUTION=centos
     DIST_VERSION=7-builded
     MONGODB_VERSION=3.4
+  - >
+    DISTRIBUTION=centos
+    DIST_VERSION=7-builded
+    MONGODB_VERSION=3.2
 #  - >
 #    distribution=debian
 #    version=7