Attempt to fix Travis-CI log size error

.travis.yml

 language: java
 services: mongodb
 
-install: mvn install -q -U -DskipTests=true -P spring-snapshot
-script: mvn install -q -nsu -P '!integration'
+install: mvn install -q -U -DskipTests=true -Dmaven.test.redirectTestOutputToFile=true -P spring-snapshot
+script: mvn install -q -nsu -Dmaven.test.redirectTestOutputToFile=true -P '!integration'

spring-boot/src/test/resources/logback-test.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<configuration>
-	<property name="LOG_PATTERN" value="[%d{yyyy-MM-dd HH:mm:ss.SSS}] spring - ${PID:-????} %5p [%t] --- %c{1}: %m%n"/>
-	<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
-		<encoder>
-			<pattern>${LOG_PATTERN}</pattern>
-		</encoder>
-	</appender>
-	<logger name="org.springframework.boot.config" level="INFO" />
-	<root level="INFO">
-		<appender-ref ref="CONSOLE" />
-	</root>
-</configuration>