Removed dependencies on slf4j-log4j and the mysql jdbc driver

Both dependencies should be provided by the user of metafacture because
the concret implementation depends on the environment.

Author: cboehme

pom.xml

@@ -232,7 +232,7 @@
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-log4j12</artifactId>
 			<version>1.7.2</version>
-			<scope>runtime</scope>
+			<scope>test</scope>
 		</dependency>
 
 		<dependency>
@@ -241,11 +241,6 @@
 			<version>1.7.2</version>
 		</dependency>
 
-		<dependency>
-			<groupId>mysql</groupId>
-			<artifactId>mysql-connector-java</artifactId>
-			<version>5.1.6</version>
-		</dependency>
 
 		<dependency>
 			<groupId>org.antlr</groupId>