pools: disallow asterisks and numeric-only names.

test/factories/pool.rb

@@ -1,6 +1,6 @@
 FactoryGirl.define do
   factory(:pool) do
-    name {(rand(1_000_000) + 100).to_s}
+    name {"pool_" + (rand(1_000_000) + 100).to_s}
     association :creator, :factory => :user
     description {FFaker::Lorem.sentences.join(" ")}
   end

test/unit/pool_test.rb

@@ -263,6 +263,8 @@ class PoolTest < ActiveSupport::TestCase
 
     context "when validating names" do
       should_not allow_value("foo,bar").for(:name)
+      should_not allow_value("foo*bar").for(:name)
+      should_not allow_value("123").for(:name)
       should_not allow_value("___").for(:name)
       should_not allow_value("   ").for(:name)