bump fog-core dep, cleanup user-agent expectation

fog.gemspec

@@ -41,7 +41,7 @@ Gem::Specification.new do |s|
 
   ## List your runtime dependencies here. Runtime dependencies are those
   ## that are needed for an end user to actually USE your code.
-  s.add_dependency("fog-core", "~> 1.23")
+  s.add_dependency("fog-core", "~> 1.24")
   s.add_dependency("fog-json")
 
   s.add_dependency('nokogiri', '~> 1.5', '>= 1.5.11')

tests/core/connection_tests.rb

@@ -8,7 +8,7 @@ Shindo.tests('Fog::Core::Connection', ['core']) do
     @instance = Fog::Core::Connection.new("http://example.com")
     responds_to([:request, :reset])
 
-    tests('user agent').returns("fog/#{Fog::VERSION}") do
+    tests('user agent').returns("fog/#{Fog::VERSION} fog-core/#{Fog::Core::VERSION}") do
       @instance.instance_variable_get(:@excon).data[:headers]['User-Agent']
     end
   end