Merge branch 'master-add-lcg-python-packages' into 'master'

Add pandas and sqlalchemy python modules

See merge request !491

Build/AtlasLCG/modules/Findpandas.cmake

+# Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
+#
+# Sets:
+#  PANDAS_PYTHON_PATH
+#
+# Can be steered by PANDAS_LCGROOT.
+#
+
+# The LCG include(s).
+include( LCGFunctions )
+
+# Find it.
+lcg_python_external_module( NAME pandas
+   PYTHON_NAMES pandas/__init__.py pandas.py )
+
+# Handle the standard find_package arguments.
+include( FindPackageHandleStandardArgs )
+find_package_handle_standard_args( pandas DEFAULT_MSG
+   _PANDAS_PYTHON_PATH )
+
+# Set up the RPM dependency.
+lcg_need_rpm( pandas )

Build/AtlasLCG/modules/Findsqlalchemy.cmake

+# Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
+#
+# Sets:
+#  SQLALCHEMY_PYTHON_PATH
+#
+# Can be steered by SQLALCHEMY_LCGROOT.
+#
+
+# The LCG include(s).
+include( LCGFunctions )
+
+# Find it.
+lcg_python_external_module( NAME sqlalchemy
+   PYTHON_NAMES sqlalchemy/__init__.py sqlalchemy.py )
+
+# Handle the standard find_package arguments.
+include( FindPackageHandleStandardArgs )
+find_package_handle_standard_args( sqlalchemy DEFAULT_MSG
+   _SQLALCHEMY_PYTHON_PATH )
+
+# Set up the RPM dependency.
+lcg_need_rpm( sqlalchemy )