Fix some errors with pylint

wo/core/acme.py

@@ -13,11 +13,10 @@ class WOAcme:
     """Acme.sh utilities for WordOps"""
 
     def setupletsencrypt(self, acme_domains, acmedata):
-        """issue SSL certificates with acme.sh"""
+        """Issue SSL certificates with acme.sh"""
         all_domains = '\' -d \''.join(acme_domains)
         wo_acme_dns = acmedata['acme_dns']
-        keylenght = "{0}".format(self.app.config.get('letsencrypt',
-                                                     'keylength'))
+        keylenght = "{0}".format(WOVariables.wo_keylength)
         wo_acme_exec = ("/etc/letsencrypt/acme.sh --config-home "
                         "'/etc/letsencrypt/config'")
         if acmedata['dns'] is True:
@@ -96,8 +95,7 @@ class WOAcme:
 
             if not WOFileUtils.grep(self, '/var/www/22222/conf/nginx/ssl.conf',
                                     '/etc/letsencrypt'):
-                Log.info(self, "Securing WordOps backend with current cert"
-                         .format(wo_domain_name))
+                Log.info(self, "Securing WordOps backend with current cert")
                 sslconf = open("/var/www/22222/conf/nginx/ssl.conf",
                                encoding='utf-8', mode='w')
                 sslconf.write("ssl_certificate     {0}/{1}/fullchain.pem;\n"

wo/core/mysql.py

@@ -54,14 +54,14 @@ class WOMysql():
                     db=db_name, read_default_file='~/.my.cnf')
 
             return connection
+        except pymysql.err.InternalError as e:
+            Log.debug(self, str(e))
+            raise MySQLConnectionError
         except DatabaseError as e:
             if e.args[1] == '#42000Unknown database \'{0}\''.format(db_name):
                 raise DatabaseNotExistsError
             else:
                 raise MySQLConnectionError
-        except pymysql.err.InternalError as e:
-            Log.debug(self, str(e))
-            raise MySQLConnectionError
         except Exception as e:
             Log.debug(self, "[Error]Setting up database: \'" + str(e) + "\'")
             raise MySQLConnectionError

wo/core/variables.py

@@ -111,6 +111,8 @@ class WOVariables():
     wo_nginx = ["nginx-custom", "nginx-wo"]
     wo_nginx_key = '188C9FB063F0247A'
 
+    wo_keylength = self.app.config.get('letsencrypt', 'keylength')
+
     wo_php = ["php7.2-fpm", "php7.2-curl", "php7.2-gd", "php7.2-imap",
               "php7.2-readline", "php7.2-common", "php7.2-recode",
               "php7.2-cli", "php7.2-mbstring", "php7.2-intl",