Support 'searchText' parameter in get_all_items api call

[pniaps]

This change allows using the searchText parameter in Get all items api call.

You can use something like this

results = glpi.get_all_items(
            'Computer',
            get_hateoas=0,
            searchText = {'name':'server','comment':'critical'}
        )

Remember, the searchText parameter is used as LIKE condition on GLPI side, so the example before will return the computers whichs contains server in his name and critical in his comment.

[pniaps]

Thanks for your comments.

[fmenabe]

version 0.4.0 has been released on Pypi