Use sonar-api logging

Removing our own references to logging via SLF4J and using the
recommended way of obtaining a logger from the sonar-api. We're always
working within the SonarQube context, so we let it provide the logging
setup.

pom.xml

@@ -67,12 +67,6 @@
             <artifactId>commons-lang</artifactId>
             <version>2.6</version>
         </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-classic</artifactId>
-            <version>0.9.15</version>
-            <scope>provided</scope>
-        </dependency>
     </dependencies>
 
     <build>

src/main/java/com/stepstone/sonar/plugin/coldfusion/cflint/CFLintAnalyzer.java

@@ -18,22 +18,22 @@
 
 import com.google.common.base.Preconditions;
 import com.stepstone.sonar.plugin.coldfusion.ColdFusionPlugin;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.sonar.api.batch.fs.FileSystem;
 import org.sonar.api.batch.sensor.SensorContext;
 import org.sonar.api.config.Settings;
 import org.sonar.api.utils.command.Command;
 import org.sonar.api.utils.command.CommandExecutor;
 import org.sonar.api.utils.command.StreamConsumer;
+import org.sonar.api.utils.log.Logger;
+import org.sonar.api.utils.log.Loggers;
 
 import javax.xml.stream.XMLStreamException;
 import java.io.File;
 import java.io.IOException;
 
 public class CFLintAnalyzer {
 
-    private final Logger log = LoggerFactory.getLogger(CFLintAnalyzer.class);
+    private final Logger LOGGER = Loggers.get(CFLintAnalyzer.class);
     private final Settings settings;
     private final FileSystem fs;
 
@@ -85,7 +85,7 @@ private class LogInfoStreamConsumer implements StreamConsumer {
 
         @Override
         public void consumeLine(String line) {
-            log.info(line);
+            LOGGER.info(line);
         }
 
     }
@@ -94,7 +94,7 @@ private class LogErrorStreamConsumer implements StreamConsumer {
 
         @Override
         public void consumeLine(String line) {
-            log.error(line);
+            LOGGER.error(line);
         }
 
     }