new package: py-python-ldap (#12599)

* new package: py-python-ldap

* fix dependency types

* improvements

* Update var/spack/repos/builtin/packages/py-python-ldap/package.py

Co-Authored-By: Adam J. Stewart <ajstewart426@gmail.com>

* Update var/spack/repos/builtin/packages/py-python-ldap/package.py

Co-Authored-By: Adam J. Stewart <ajstewart426@gmail.com>

* add openldap dependency

var/spack/repos/builtin/packages/py-python-ldap/package.py

+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PyPythonLdap(PythonPackage):
+    """python-ldap provides an object-oriented API to access LDAP directory
+    servers from Python programs.
+    """
+
+    homepage = "https://www.python-ldap.org/en/python-ldap-3.2.0/"
+    url      = "https://pypi.io/packages/source/p/python-ldap/python-ldap-3.2.0.tar.gz"
+
+    version('3.2.0', sha256='7d1c4b15375a533564aad3d3deade789221e450052b21ebb9720fb822eccdb8e')
+    version('3.0.0', sha256='86746b912a2cd37a54b06c694f021b0c8556d4caeab75ef50435ada152e2fbe1')
+
+    depends_on('openldap+client_only', type=('build', 'link', 'run'))
+    depends_on('py-setuptools', type='build')
+    depends_on('python@2.7:2.8,3.4:', type=('build', 'run'))
+    depends_on('py-pyasn1@0.3.7:', type=('build', 'run'))
+    depends_on('py-pyasn1-modules@0.1.5:', type=('build', 'run'))