Handle absence of Content-Type in Simulator

If no Content-Type header was provided, the simulator would throw
an exception when trying to parse a null content type.

Change-Id: Ife5caa94c166700b309f5a0b4603b45191b08425
Issue-ID: SDC-4181
Signed-off-by: andre.schmid <andre.schmid@est.tech>
diff --git a/utils/webseal-simulator/pom.xml b/utils/webseal-simulator/pom.xml
index 610d4fc..265dead 100644
--- a/utils/webseal-simulator/pom.xml
+++ b/utils/webseal-simulator/pom.xml
@@ -46,6 +46,11 @@
         </dependency>
 
         <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+        </dependency>
+
+        <dependency>
             <groupId>commons-logging</groupId>
             <artifactId>commons-logging-api</artifactId>
             <version>1.0.4</version>