GUAC-587: Add guac-manifest.json to JDBC auth implementations.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/guac-manifest.json

@@ -0,0 +1,11 @@
+{
+
+    "name"      : "MySQL Authentication",
+    "namespace" : "guac-mysql",
+
+    "authProviders" : [
+        "net.sourceforge.guacamole.net.auth.mysql.MySQLAuthenticationProvider"
+    ]
+
+}
+

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/guac-manifest.json

@@ -0,0 +1,11 @@
+{
+
+    "name"      : "PostgreSQL Authentication",
+    "namespace" : "guac-postgresql",
+
+    "authProviders" : [
+        "org.glyptodon.guacamole.auth.postgresql.PostgreSQLAuthenticationProvider"
+    ]
+
+}
+