Hello!

I just updated our setup to the new 1.1.1 version of the Nodejs Plugin and experienced problems with the EnvInject Plugin. I tracked it down to a change between Version 0.2.2 and 1.0.0 in the Nodejs plugin.

Steps to reproduce:
1. Disable all plugins
2. Install Nodejs and EnvInject Plugin (Environment Inject in the plugin list)
3. Create a Nodejs configuration that installs an arbitrary version from nodejs.org (e.g. 6.9.3)
4. Create a test job with nothing enabled but "Provide Node & npm bin/ folder to PATH" with the created nodejs configuration and the system wide npmrc
5. Add "Execute shell script" with "which node; which npm; node -v; npm -v"

Even though the EnvInject plugin is only enabled as a plugin, but not configured in the job ("Inject environment variables to the build process" is unticked) the result of the job looks like this:

[EnvInject] - Loading node environment variables.
Building in workspace /var/lib/jenkins/jobs/nodejs/workspace
[workspace] $ /bin/sh -xe /tmp/hudson5471480512323947214.sh
+ which node
/usr/local/bin/node
+ which npm
/usr/local/bin/npm
+ node -v
v6.9.4
+ npm -v
4.1.2
Finished: SUCCESS

When I disable the EnvInject plugin in the plugin list the output looks as expected:

Started by user anonymous
Building in workspace /var/lib/jenkins/jobs/nodejs/workspace
[workspace] $ /bin/sh -xe /tmp/hudson2888187863059550468.sh
+ which node
/var/lib/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/node-js-test/bin/node
+ which npm
/var/lib/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/node-js-test/bin/npm
+ node -v
v6.9.3
+ npm -v
3.10.10
Finished: SUCCESS

I hope this problem can be fixed, because both plugins are very important for us.

Thank you in advance!
Ben