Added fix for the start action for command using mvn/gradle

[SuparnaSuresh]

Fixes #397

Changes added for the command executing using mvn/gradle for windows - terminals cmd and poweshell

[TrevCraw]

Changes look good. Looking at the new method name and comment:

/**
 * Returns default format for the command with Path  
 */
function formDefaultCommandWithPath(projectPath: string, buildFilePath: String, command: string, cmdOption: String, customCommand?: string)

Both the comment and name should be updated to be more clear. This was confusing at first because the method still used projectPath and buildFilePath. Looking at where this method is called, it eventually became clear that this is referring to the "executable" path or the "build command" path.

Please open an issue to improve the name and explanation of this method. It can be addressed in the next release.