Various minor cleanups and fixes (#938)

* Documentation fixes

* Various docstring and help string fixes

* Minor code cleanups

* Removed redundant .gitignore entry, ignored package-lock.json.
* 'return' statement in certificates.service.render was redundant
* Split up too long line
* Non-matching tags in templates

lemur/plugins/base/v1.py

@@ -101,7 +101,7 @@ class IPlugin(local):
         Returns a list of tuples pointing to various resources for this plugin.
         >>> def get_resource_links(self):
         >>>     return [
-        >>>         ('Documentation', 'http://lemury.readthedocs.org'),
+        >>>         ('Documentation', 'https://lemur.readthedocs.io'),
         >>>         ('Bug Tracker', 'https://github.com/Netflix/lemur/issues'),
         >>>         ('Source', 'https://github.com/Netflix/lemur'),
         >>>     ]

lemur/plugins/lemur_aws/elb.py

@@ -98,7 +98,7 @@ def get_all_elbs_v2(**kwargs):
 @retry(retry_on_exception=retry_throttled, stop_max_attempt_number=7, wait_exponential_multiplier=1000)
 def get_listener_arn_from_endpoint(endpoint_name, endpoint_port, **kwargs):
     """
-    Get a listener ARN from a endpoint.
+    Get a listener ARN from an endpoint.
     :param endpoint_name:
     :param endpoint_port:
     :return:

lemur/plugins/lemur_linuxdst/plugin.py

@@ -62,7 +62,7 @@ class LinuxDstPlugin(DestinationPlugin):
             "name": "exportType",
             "required": True,
             "value": "NGINX",
-            "helpMessage": "Reference the docs for an explaination of each export type",
+            "helpMessage": "Reference the docs for an explanation of each export type",
             "type": "select"
         }
     ]

lemur/plugins/lemur_linuxdst/remote_host.py

@@ -19,7 +19,7 @@ def copy_cert(cert_cn, dst_user, dst_priv, dst_priv_key, dst_host, dst_port, dst
     sftp = ssh.open_sftp()
 
     # make the directory on the destination server
-    # files will be in a a folder based on the cert_cn
+    # files will be in a folder based on the cert_cn
     # example:
     # destination folder: /etc/nginx/certs/
     # files will go in: /etc/nginx/certs/your.cn.com/cert.pem

lemur/plugins/lemur_openssl/plugin.py

@@ -98,7 +98,7 @@ class OpenSSLExportPlugin(ExportPlugin):
             'name': 'passphrase',
             'type': 'str',
             'required': False,
-            'helpMessage': 'If no passphrase is given one will be generated for you, we highly recommend this. Minimum length is 8.',
+            'helpMessage': 'If no passphrase is given one will be generated for you, we highly recommend this.',
             'validation': ''
         },
         {
@@ -111,7 +111,7 @@ class OpenSSLExportPlugin(ExportPlugin):
 
     def export(self, body, chain, key, options, **kwargs):
         """
-        Generates a Java Keystore or Truststore
+        Generates a PKCS#12 archive.
 
         :param key:
         :param chain: