Automated provider resource

[vinpatel24]

• Added creation of template directory with main and test tf templates
• Test.tf template needs to be created in a specific order (FIX)
• Added code file which converts given configuration into xpath inputs which leads to the build of a usable terraform provider in one step
• Made edits to the shell script to create provider through one run/test given config
• Xpath inputs which are not found are automatically removed from the file
• Edited provider.go file to have a 'mock mode' allowing user to test configuration using terraform by adding env variable
• Shell script is now fully functionable to except config and return providers
• Edited netconf helper to apply groups to device in chronological order
• Added test config for user to see initial config example
• Edited READme to reflect all changes