Merge "Improve the policy model download"

diff --combined pom.xml
index b9abc4f,34054da..f30fe85
--- 1/pom.xml
--- 2/pom.xml
+++ b/pom.xml
@@@ -99,7 -99,7 +99,7 @@@
                <docker.skip.tag>true</docker.skip.tag>
                <skip.staging.artifacts>false</skip.staging.artifacts>
                <python.http.proxy.param />
 -              <tomcat.version>9.0.27</tomcat.version>
 +              <tomcat.version>9.0.33</tomcat.version>
                <ui.react.src>ui-react</ui.react.src>
                <ui.react.lib.src>ui-react-lib</ui.react.lib.src>
                <npm.publish.url>https://nexus3.onap.org/repository/npm.snapshot/</npm.publish.url>
@@@ -428,10 -428,6 +428,10 @@@
                                        <groupId>javax.servlet</groupId>
                                        <artifactId>servlet-api</artifactId>
                                </exclusion>
 +                              <exclusion>
 +                                      <groupId>log4j</groupId>
 +                                      <artifactId>log4j</artifactId>
 +                              </exclusion>
                        </exclusions>
                </dependency>
                <dependency>
@@@ -534,6 -530,11 +534,11 @@@
                        <artifactId>sdc-tosca</artifactId>
                        <version>1.5.1</version>
                </dependency>
+               <dependency>
+                       <groupId>org.yaml</groupId>
+                       <artifactId>snakeyaml</artifactId>
+                       <version>1.26</version>
+               </dependency>
                <!-- TESTING -->
                <dependency>
                        <groupId>org.assertj</groupId>