Create Sample to Check Environment Configuration

[DMickens]

In an effort to make it as easy as possible for a consumer of the node.js package to go from nothing to having a configured environment and working driver we want to put together a sample javascript file that can be executed in node and checks for a correctly configured environment (version of node, version of the vertica-nodejs packages, version of server if able to connect, environment variables, etc.) and then try and connect and run queries. If any of these checks fail it should provide the user with information about what failed and, if we have the information, a potential reason why it failed. For something like version of node, everything may still work fine. In this case we would just print a notice that they are using a version of node not recommended, but everything still was able to work as expected