fix(bigquery-jdbc): shade org.slf4j

Author: logachev

java-bigquery-jdbc/pom.xml

@@ -152,6 +152,10 @@
                       <pattern>org.json</pattern>
                       <shadedPattern>com.google.bqjdbc.shaded.org.json</shadedPattern>
                     </relocation>
+                    <relocation>
+                      <pattern>org.slf4j</pattern>
+                      <shadedPattern>com.google.bqjdbc.shaded.org.slf4j</shadedPattern>
+                    </relocation>
                     <relocation>
                       <pattern>io.grpc</pattern>
                       <shadedPattern>com.google.bqjdbc.shaded.io.grpc</shadedPattern>