Add a new function to run cwp without exiting a process

[jxr98]

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Codecov Report

Merging #640 (586f42c) into master (a99158f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #640   +/-   ##
=======================================
  Coverage   37.98%   37.98%           
=======================================
  Files          13       13           
  Lines         416      416           
=======================================
  Hits          158      158           
  Misses        246      246           
  Partials       12       12           

Flag	Coverage Δ
unittests	37.98% <ø> (ø)

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[jxr98]

I want to use the cwpOptions.Run() method in other go files, but this function uses syscall.Exec() which ends a process and the following code are not executing. So I creates a new function called RunWithoutProcessExits() and the logic is the same basically, while using exec.Command() which doesn't exiting a process instead of syscall.Exec().

[LinuxSuRen]

Thanks for your contribution. There are a few small problems you might need to take a look at them.

[jxr98]

The e2e Test/ Build ubuntu failed, but I don't know why. Could someone give me a hint on it. That would be appreciated.
Is it because the function I wrote doesn't ending a process?

[jxr98]

Hello Rick! This pr is needed to be merged first. Thanks for your reviewing.
An example to use this new added function is as follows:

var rootCmd = &cobra.Command{
 Use:   "sth",
 Short: "sth",
 RunE: func(cmd *cobra.Command, args []string)(err error) {
   var cwpOptions CWPOptions
   cwpOptions.ConfigPath = pathToYamlFile
   err =cwpOptions.RunWithoutProcessExits(cmd, args)
  return err
 },
}

But this is not a complete file and more information about cobra is available here.