increase db pool size

Otherwise, feature specs and cukes testing the timelines view seem to hang up waiting for db connections

config/database.yml.example

@@ -54,6 +54,7 @@ test:
   username: root
   password:
   encoding: utf8
+  pool: 20
 
 #test_pgsql:
   #adapter: postgresql

script/templates/database.travis.mysql.yml

@@ -31,3 +31,4 @@ test:
   database: travis_ci_test
   username: travis
   encoding: utf8
+  pool: 20

script/templates/database.travis.postgres.yml

@@ -30,3 +30,4 @@ test:
   adapter: postgresql
   database: travis_ci_test
   username: postgres
+  pool: 20