[MINOR] Set info servity for ImportOrder temporarily (#1127)

- Now we need fix import check error manually, disable the rule temporarily before finding a better solution.

style/checkstyle.xml

@@ -281,6 +281,7 @@
 
         <!-- Checks for out of order import statements. -->
         <module name="ImportOrder">
+            <property name="severity" value="info"/>
             <property name="groups" value="org.apache.hudi,*,javax,java,scala"/>
             <property name="separated" value="true"/>
             <property name="sortStaticImportsAlphabetically" value="true"/>