Description of problem:
1. Additional characters will be added unexpectedly when inputting guest's image path or OS root directory with leading spaces
2. This issue occurs both on RHEL7 and RHEL6




Version-Release number of selected component:
virt-manager-0.10.0-17.el7.noarch



How reproducible:
100%

steps:
1. Start virt-manager, and click "File" -> "Add Connection" to add a local LXC connection.

2. Create a New LXC container with "Operating system container" on "New VM" window, and click "Forward" button.

3. For "Provide the existing OS root directory", input a path with leading spaces, such as: "  /var/lib/libvirt/images/", and click "Forward" button util final window.

  


Actual results:
1. Additional characters will be added unexpectedly for "Storage" path for beginning, such as: "/root"  or "/root/Desktop"
2. Could not install vm after click "Finish" button


Expected Results:
1. Invalid path should not be accepted and should not add additional characters




Additional info:
1. This issue also occurs on RHEL6.
2. This issue also occurs for creating normal guest