[lib] Adding group_add,ssh_keygen,ssh_copy_id, set_passwd to lib_utils.

Adding the following functions tot lib_utils.py:
1.ssh_keygen(): Creates a pair of ssh private
                and public key if not present.
2.set_passwd(): Sets password for a given username.
3.ssh_copy_id(): Copies the default ssh public key.
4.group_add(): Creates a group in all the servers.

Modifying add_user() to create and add user to a
specific group. Also modifying the code in add_user()
to take list of servers.

Change-Id: I58cdef967293204073aa912fa98adb9606f6885d
Signed-off-by: kshithijiyer <kshithij.ki@gmail.com>

0 files changed, 0 insertions, 0 deletions