title: can't save smileys in mysql DB liferay
body: <p>I am using <strong>liferay 6.2</strong> with <strong>mysql- 5.5.52</strong>. In a custom portlet I have exposed some web services which are used by Android &amp; ios apps, in some api their is a string parameter &amp; if we send smiles in that param like , it throws exception: <strong>java.sql.SQLException: Incorrect string value: '\xF0\x9F\x98\x90\xF0\x9F...' for column 'comment_' at row 1</strong>, I have also tried changing database collation to <strong>utf8mb4 -default collation</strong>, in that case i am able to save this ☺, but not others, I am trying to find out what is the issue.</p>