升级druid到最新版本1.2.15

Signed-off-by: Rain <938448486@qq.com>

pom.xml

@@ -27,7 +27,7 @@
         <tobato.version>1.27.2</tobato.version>
         <kaptcha.version>2.3.2</kaptcha.version>
         <pagehelper.boot.version>1.4.5</pagehelper.boot.version>
-        <druid.version>1.2.14</druid.version>
+        <druid.version>1.2.15</druid.version>
         <dynamic-ds.version>3.5.2</dynamic-ds.version>
         <commons.io.version>2.11.0</commons.io.version>
         <commons.fileupload.version>1.4</commons.fileupload.version>