update maven-assembly-plugin

update version to 3.1.0

should fix issue in downloading the depandencys twice
Issue-ID: SDC-1191

Change-Id: I83da786e04c161634ae8aed592501ef73834ab1d
Signed-off-by: Michael Lando <ml636r@att.com>
diff --git a/asdctool/pom.xml b/asdctool/pom.xml
index 9a1a0e5..b429e61 100644
--- a/asdctool/pom.xml
+++ b/asdctool/pom.xml
@@ -570,7 +570,9 @@
 						<configuration>
 							<finalName>sdctool</finalName>
 							<appendAssemblyId>false</appendAssemblyId>
-							<descriptor>${project.basedir}/tarball.xml</descriptor>
+							<descriptors>
+								<descriptor>${project.basedir}/tarball.xml</descriptor>
+							</descriptors>
 						</configuration>
 						<id>assemble-file</id>
 						<phase>verify</phase>
diff --git a/catalog-be/pom.xml b/catalog-be/pom.xml
index da0df12..e99789d 100644
--- a/catalog-be/pom.xml
+++ b/catalog-be/pom.xml
@@ -769,7 +769,9 @@
                         <configuration>
                             <finalName>normatives</finalName>
                             <appendAssemblyId>false</appendAssemblyId>
-                            <descriptor>${project.basedir}/normatives.xml</descriptor>
+                            <descriptors>
+                                <descriptor>${project.basedir}/normatives.xml</descriptor>
+                            </descriptors>
                         </configuration>
                     </execution>
                 </executions>
diff --git a/pom.xml b/pom.xml
index 9c8ab1f..2d946e8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -210,7 +210,7 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-assembly-plugin</artifactId>
-					<version>2.6</version>
+					<version>3.1.0</version>
 				</plugin>
 
 				<plugin>