[#1378] Switch to Tomcat

switch hawkBit web server to Tomcat (was Jetty)

Signed-off-by: Marinov Avgustin <Avgustin.Marinov@bosch.com>

hawkbit-starters/hawkbit-boot-starter-ddi-api/pom.xml

@@ -25,10 +25,6 @@
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
       </dependency>
-      <dependency>
-         <groupId>org.springframework.boot</groupId>
-         <artifactId>spring-boot-starter-jetty</artifactId>
-      </dependency>
       <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter</artifactId>