Resolve compile error at tesb-rt-se build.
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
+ <dependency>
+ <groupId>log4j</groupId>
+ <artifactId>log4j</artifactId>
+ <version>${log4j.version}</version>
+ </dependency>
</dependencies>
<build>
