Use default supplied npm with node.js

Author: edwinvdgraaf

Dockerfile

@@ -41,7 +41,6 @@ RUN \
   CXX="g++ -Wno-unused-local-typedefs" make install && \
   cd /tmp && \
   rm -rf /tmp/node-v* && \
-  npm install -g npm && \
   echo -e '\n# Node.js\nexport PATH="node_modules/.bin:$PATH"' >> /root/.bashrc
 
 # Download phantomjs build (see README)

spec/dockerfile_spec.rb

@@ -50,7 +50,7 @@ def remove(*); end
   end
 
   describe command("npm -v") do
-    its(:stdout) { should match /3\.3\.8/ }
+    its(:stdout) { should match /2\.14\.7/ }
   end
 
   describe command("phantomjs -v") do