It was possible to have several entries for names with the hosts and users
lists. This resulted sometimes in errors but also unexpected changes. A new
check has been added to make sure that the names in the users and hosts
lists are unique.

New tests have been added to verify this in the existing files:
- tests/host/test_hosts.yml
- tests/user/test_users.yml

certmapdata was not processed properly. The certificate was not loaded and
therefore the `issuer` and `subject` could not be compared to the
certmapdata entries in the user record. The function `load_cert_from_str`
from ansible_freeipa_moduleis used for this.

Additionally there was no way to use the certmapdata data format. This
is now possible with the `data` option in the certmapdata dict.

Example: "data: X509:<I>dc=com,dc=example,CN=ca<S>dc=com,dc=example,CN=test"

`data` may not be used together with `certificate`, `issuer` and `subject`
in the same record.

Given certmapdata for the ipauser module is now converted to the internal
data representation using also the new function `DN_x500_text` from
`ansible_freeipa_module`.

New functions `convert_certmapdata` and `check_certmapdata` have been added
to ipauser.

tests/user/certmapdata/test_user_certmapdata.yml has been extended with
additional tasks to verify more complex issuer and subjects and also using
the data format.

Because of a missing check member attributes (for use with action: member)
are cleared when a non-member attribute is changed. The fix simply adds a
check for None (parameter not set) to gen_add_del_lists in
ansible_freeipa_module to make sure that the parameter is only changed if
it should be changed.

All places where the add and removal lists have been generated manually
have been changed to also use gen_add_del_lists.

Resolves: #252 (The "Manager" attribute is removed when updating any user
                attribute)

The tests have been using MyPassword123 and also SomeADMINpassword within
the tasks of the tests. SomeADMINpassword should be used everywhere.

Most tests have simply been using the Tests as name, but this there is a
lack of information in automated runs. The name should be similar to the
test file name.

The random password is only returned if random is yes and user did not exist
or update_password is yes.

If only one user is handled by the module, the returned dict is containing
this dict:

  { "randompassword": "<the user random password>" }

If several users are handled by the module:

  { "<user>": { "randompassword": "<the user random password>" } }

This is related to issue #134 (ipahost does not return the random password)

The ipauser module now supports all user settings and additionally to ensure
the presence of several users with the new users setting. The users setting
can also be used with other states, but it has to be limited to only contain
the name of the users.

There updated user management module is placed in the plugins folder:

  plugins/modules/ipauser.py

The user module now additionally allows to handle these user settings:

  initials
  principalexpiration
  random
  city
  userstate
  postalcode
  mobile
  pager
  fax
  orgunit
  manager
  carlicense
  sshpubkey
  userauthtype
  userclass
  radius
  radiususer
  departmentnumber
  employeenumber
  employeetype
  preferredlanguage
  certificate
  certmapdata
  noprivate
  nomembers

Here is the updated documentation for the module:

  README-user.md

New example playbooks have been added:

  playbooks/user/user_certificate_absent.yml
  playbooks/user/user_certificate_present.yml
  playbooks/user/user_present.yml
  playbooks/user/users_absent.yml
  playbooks/user/users_certificate_absent.yml
  playbooks/user/users_certificate_present.yml
  playbooks/user/users_present.yml
  plugins/modules/ipauser.py

New tests added for ipauser:

  tests/user/certificate/cert1.der
  tests/user/certificate/cert1.pem
  tests/user/certificate/cert2.der
  tests/user/certificate/cert2.pem
  tests/user/certificate/cert3.der
  tests/user/certificate/cert3.pem
  tests/user/certificate/private1.key
  tests/user/certificate/private2.key
  tests/user/certificate/private3.key
  tests/user/certificate/test_user_certificate.yml
  tests/user/certificate/test_users_certificate.yml
  tests/user/certmapdata/test_user_certmapdata.yml
  tests/user/certmapdata/test_user_certmapdata_issuer_subject.yml
  tests/user/certmapdata/test_users_certmapdata.yml
  tests/user/test_user.yml
  tests/user/test_users.yml
  tests/user/test_users_absent.yml
  tests/user/test_users_invalid_cert.yml
  tests/user/test_users_present.yml
  tests/user/test_users_present_slice.yml
  tests/user/users_absent.json
  tests/user/users_absent.sh
  tests/user/users_present.json
  tests/user/users_present.sh