[TECH] Cas : fix war build with tomcat dependencies

cas/cas-server/pom.xml

@@ -33,6 +33,20 @@
         <dependency>
             <groupId>fr.gouv.vitamui</groupId>
             <artifactId>iam-external-client</artifactId>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.springframework.boot</groupId>
+                    <artifactId>spring-boot-starter-web</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.apache.components</groupId>
+                    <artifactId>httpclient</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>com.fasterxml.jackson.dataformat</groupId>
+                    <artifactId>jackson-dataformat-xml</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
         <!-- Consul -->

cas/pom.xml

@@ -12,11 +12,8 @@
 	<properties>
         <commons-io.version>2.6</commons-io.version>
         <fongo.version>2.1.1</fongo.version>
-		<java.version>1.8</java.version>
 		<jackson.version>2.8.10</jackson.version>
         <junit.version>4.12</junit.version>
-		<maven.compiler.source>1.8</maven.compiler.source>
-		<maven.compiler.target>1.8</maven.compiler.target>
         <mockito.version>2.15.0</mockito.version>
         <servlet-api.version>3.1.0</servlet-api.version>
     </properties>