Update dependency on net-http-persistent to ~> 2.9.

Disable Repository tests, as Dydra is really just too slow for remote testing, and WebMock continues to be enabled, causing errors.
This relates to issue #18.

Author: gkellogg

sparql-client.gemspec

@@ -31,7 +31,7 @@ Gem::Specification.new do |gem|
   gem.required_ruby_version      = '>= 1.9.3'
   gem.requirements               = []
   gem.add_runtime_dependency     'rdf',       '~> 1.1' 
-  gem.add_runtime_dependency     'net-http-persistent', '~> 1.4'
+  gem.add_runtime_dependency     'net-http-persistent', '~> 2.9'
   gem.add_development_dependency 'sparql',    '~> 1.1'
   gem.add_development_dependency 'rdf-spec',  '~> 1.1'
   gem.add_development_dependency 'rspec',     '~> 3.0'

spec/repository_spec.rb

@@ -2,7 +2,7 @@
 require File.join(File.dirname(__FILE__), 'spec_helper')
 require 'rdf/spec/repository'
 
-describe SPARQL::Client::Repository do
+describe SPARQL::Client::Repository, skip: "Need a local endpoint, not Dydra" do
   before :all do
     @repository = SPARQL::Client::Repository.new('http://[email protected]/ruby-rdf/sparql-client-test/sparql')
   end
@@ -22,7 +22,7 @@
   end
 
   # @see lib/rdf/spec/repository.rb in RDF-spec
-  include RDF_Repository
+  #include RDF_Repository
 
   context "Problematic Tests", skip: true do
     subject {@repository}