relax method name pattern constraint

Author: fishercoder1534

fishercoder_checkstyle.xml

@@ -195,12 +195,6 @@
                       value="BAND, BOR, BSR, BXOR, DIV, EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF, LOR, LT, MINUS, MOD, NOT_EQUAL, PLUS, QUESTION, SL, SR, STAR "/>
         </module>
 
-        <module name="MethodName">
-            <property name="format" value="^[a-z][a-zA-Z0-9][a-zA-Z0-9_]*$"/>
-            <message key="name.invalidPattern"
-                     value="Method name ''{0}'' must match pattern ''{1}''."/>
-        </module>
-
         <module name="MethodLength">
             <property name="tokens" value="METHOD_DEF"/>
             <property name="max" value="200000"/>