Description of problem:
Account provider: create user with already created home

Version-Release number of selected component (if applicable):
openlmi-account-0.1.1-2.el7.x86_64

How reproducible:
always

Steps to Reproduce:
1,
>>> cs = self.conn.root.cimv2.Linux_ComputerSystem.first_instance()
>>> lams = self.conn.root.cimv2.LMI_AccountManagementService.first_instance()

2, mkdir /home/someuser
3, try to create user
>>> user = lams.CreateAccount(Name="someuser", System=cs)
>>> user
LMIReturnValue(rval=-1, rparams={}, errorstr=u"CIM_ERR_FAILED: Error creating homedir: Error creating `/home/someuser': File exists\n: 'CreateAccount'")


Actual results:
there is an error but user is created

Expected results:
there is no error and I can recognize that user is created. But there is just some warning.

Additional info: