Fix emoji insertion in MySQL

Switch to utf8mb4 instead of utf8 because f*** MySQL
See https://github.com/doctrine/dbal/pull/851

app/config/config.yml

@@ -75,7 +75,7 @@ doctrine:
         dbname: "%database_name%"
         user: "%database_user%"
         password: "%database_password%"
-        charset: UTF8
+        charset: "%database_charset%"
         path: "%database_path%"
         unix_socket: "%database_socket%"
         server_version: 5.6

app/config/config_test.yml

@@ -28,7 +28,7 @@ doctrine:
         dbname: "%test_database_name%"
         user: "%test_database_user%"
         password: "%test_database_password%"
-        charset: UTF8
+        charset: "%test_database_charset%"
         path: "%test_database_path%"
     orm:
         metadata_cache_driver:

app/config/parameters.yml.dist

@@ -19,6 +19,8 @@ parameters:
     database_path: "%kernel.root_dir%/../data/db/wallabag.sqlite"
     database_table_prefix: wallabag_
     database_socket: null
+    # with MySQL, use "utf8mb4" if got problem with content with emojis
+    database_charset: utf8
 
     mailer_transport: smtp
     mailer_host: 127.0.0.1

app/config/parameters_test.yml

@@ -6,3 +6,4 @@ parameters:
     test_database_user: null
     test_database_password: null
     test_database_path: '%kernel.root_dir%/../data/db/wallabag_test.sqlite'
+    test_database_charset: utf8

app/config/tests/parameters_test.mysql.yml

@@ -6,3 +6,4 @@ parameters:
     test_database_user: root
     test_database_password: ~
     test_database_path: ~
+    test_database_charset: utf8mb4

app/config/tests/parameters_test.pgsql.yml

@@ -6,3 +6,4 @@ parameters:
     test_database_user: travis
     test_database_password: ~
     test_database_path: ~
+    test_database_charset: utf8

app/config/tests/parameters_test.sqlite.yml

@@ -6,3 +6,4 @@ parameters:
     test_database_user: ~
     test_database_password: ~
     test_database_path: "%kernel.root_dir%/../data/db/wallabag_test.sqlite"
+    test_database_charset: utf8mb4

src/Wallabag/CoreBundle/Entity/Entry.php

@@ -19,7 +19,7 @@ use Wallabag\AnnotationBundle\Entity\Annotation;
  *
  * @XmlRoot("entry")
  * @ORM\Entity(repositoryClass="Wallabag\CoreBundle\Repository\EntryRepository")
- * @ORM\Table(name="`entry`")
+ * @ORM\Table(name="`entry`", options={"collate"="utf8mb4_unicode_ci", "charset"="utf8mb4"})
  * @ORM\HasLifecycleCallbacks()
  * @Hateoas\Relation("self", href = "expr('/api/entries/' ~ object.getId())")
  */