Relax `ParenPad` checkstyle rule

Eclipse Mars has a formatter bug (#479291) that sometimes adds
additional whitespace on annotations. Until it's fixed we need to relax
the `ParenPad` checkstyle rule.

spring-boot-parent/src/checkstyle/checkstyle.xml

@@ -143,7 +143,7 @@
 			<property name="tokens" value="BNOT, DEC, DOT, INC, LNOT, UNARY_MINUS, UNARY_PLUS, ARRAY_DECLARATOR"/>
 		</module>
 		<module name="NoWhitespaceBefore" />
-		<module name="ParenPad" />
+		<!-- <module name="ParenPad" /> -->
 		<module name="TypecastParenPad" />
 		<module name="WhitespaceAfter" />
 		<module name="WhitespaceAround" />