Implement PBR for XLS plugin

Spyglass uses PBR for its packaging so it makes sense that its plugins
would do the same. This change makes the necessary updates to have
spyglass-plugin-xls use python build reasonableness.

Implements PBR in setup.py and setup.cfg

Moves YAPF configuration into setup.cfg

Change-Id: Ie0dab14bc266a0000566995c8fb2f9640fce7868

.style.yapf

@@ -1,6 +0,0 @@
-[style]
-based_on_style = pep8
-allow_split_before_dict_value = false
-blank_line_before_nested_class_or_def = true
-blank_line_before_module_docstring = true
-split_before_logical_operator = false

requirements.txt

@@ -2,4 +2,4 @@ click==7.0
 PyYAML==5.1.1
 openpyxl==2.6.2
 
-git+https://opendev.org/airship/spyglass.git
+git+https://opendev.org/airship/spyglass.git#egg=spyglass

setup.cfg

@@ -0,0 +1,32 @@
+[metadata]
+name = spyglass-plugin-xls
+version = 0.0.1
+summary = Spyglass Excel data source plugin
+description = Plugin to extract data for Spyglass from Excel spreadsheets
+description-file = README.rst
+author = The Airship Authors
+author-email = airship-discuss@lists.airshipit.org
+home-page = https://opendev.org/airship/spyglass-plugin-xls
+license = Apache-2
+requires-python = >=3.5
+classifier =
+    Intended Audience :: Information Technology
+    Intended Audience :: System Administrators
+    License :: OSI Approved :: Apache Software License
+    Operating System :: POSIX :: Linux
+    Programming Language :: Python
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.5
+    Programming Language :: Python :: 3.6
+
+[files]
+packages =
+    spyglass_plugin_xls
+
+[yapf]
+based_on_style = pep8
+allow_split_before_dict_value = false
+blank_line_before_nested_class_or_def = true
+blank_line_before_module_docstring = true
+split_before_logical_operator = false
+split_before_first_argument = true

setup.py

@@ -11,25 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+import setuptools
 
-from setuptools import setup
-from setuptools import find_packages
-
-setup(
-    name='spyglass_plugin_xls',
-    version='0.0.1',
-    description='Excel data source plugin for Spyglass',
-    url='https://opendev.org/airship/spyglass-plugin-xls',
-    python_requires='>=3.5.0',
-    license='Apache 2.0',
-    packages=find_packages(),
-    install_requires=[
-        'click==7.0',
-        'PyYAML==5.1',
-        'openpyxl==2.6.2',
-    ],
-    dependency_links=[
-        'git+https://opendev.org/airship/spyglass.git',
-    ],
-    include_package_data=True,
-)
+setuptools.setup(setup_requires=['pbr>=2.0.0'], pbr=True)