route53: rename to match other DNS plugins (#4747)

This change renames certbot-route53 to certbot-dns-route53 and updates
the package's setup.py file to maintain backwards compatibility.

Testing Done:
 * Run `certbot` with `-a certbot-route53:auth`, verify the plugin runs.
 * Run `certbot` with `--dns-route53`, verify the plugin runs.

certbot-dns-route53/setup.py

@@ -0,0 +1,60 @@
+import sys
+
+from distutils.core import setup
+from setuptools import find_packages
+
+version = '0.15.0.dev0'
+
+install_requires = [
+    'acme=={0}'.format(version),
+    'certbot=={0}'.format(version),
+    'boto3',
+    'mock',
+    # For pkg_resources. >=1.0 so pip resolves it to a version cryptography
+    # will tolerate; see #2599:
+    'setuptools>=1.0',
+    'zope.interface',
+]
+
+setup(
+    name='certbot-dns-route53',
+    version=version,
+    description="Route53 DNS Authenticator plugin for Certbot",
+    url='https://github.com/certbot/certbot',
+    author="Certbot Project",
+    author_email='client-dev@letsencrypt.org',
+    license='Apache License 2.0',
+    classifiers=[
+        'Development Status :: 3 - Alpha',
+        'Environment :: Plugins',
+        'Intended Audience :: System Administrators',
+        'License :: OSI Approved :: Apache Software License',
+        'Operating System :: POSIX :: Linux',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.6',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Topic :: Internet :: WWW/HTTP',
+        'Topic :: Security',
+        'Topic :: System :: Installation/Setup',
+        'Topic :: System :: Networking',
+        'Topic :: System :: Systems Administration',
+        'Topic :: Utilities',
+    ],
+    packages=find_packages(),
+    include_package_data=True,
+    install_requires=install_requires,
+    keywords=['certbot', 'route53', 'aws'],
+    entry_points={
+        'certbot.plugins': [
+            'dns-route53 = certbot_dns_route53.dns_route53:Authenticator',
+            'certbot-route53:auth = certbot_dns_route53.dns_route53:Authenticator'
+        ],
+    },
+    test_suite='certbot_dns_route53',
+)