[build] changed checkstyle linelength to 120

checkstyle.xml

@@ -115,7 +115,9 @@ LICENSE file.
 
         <!-- Checks for Size Violations.                    -->
         <!-- See http://checkstyle.sf.net/config_sizes.html -->
-        <module name="LineLength"/>
+        <module name="LineLength">
+            <property name="max" value="120"/>
+        </module>
         <module name="MethodLength"/>
         <module name="ParameterNumber"/>