[MNG-7661] Fix few build / compiler warnings
diff --git a/core-it-support/core-it-javaagent/pom.xml b/core-it-support/core-it-javaagent/pom.xml
index 58802bd..303487a 100644
--- a/core-it-support/core-it-javaagent/pom.xml
+++ b/core-it-support/core-it-javaagent/pom.xml
@@ -53,6 +53,17 @@
             <goals>
               <goal>shade</goal>
             </goals>
+            <configuration>
+              <filters>
+                <filter>
+                  <artifact>org.ow2.asm:*</artifact>
+                  <excludes>
+                    <exclude>module-info.class</exclude>
+                    <exclude>META-INF/MANIFEST.MF</exclude>
+                  </excludes>
+                </filter>
+              </filters>
+            </configuration>
           </execution>
         </executions>
       </plugin>
diff --git a/core-it-support/core-it-plugins/maven-it-plugin-artifact/pom.xml b/core-it-support/core-it-plugins/maven-it-plugin-artifact/pom.xml
index f688266..360605b 100644
--- a/core-it-support/core-it-plugins/maven-it-plugin-artifact/pom.xml
+++ b/core-it-support/core-it-plugins/maven-it-plugin-artifact/pom.xml
@@ -72,6 +72,7 @@
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-repository-metadata</artifactId>
+      <scope>provided</scope>
     </dependency>
   </dependencies>
 </project>
diff --git a/core-it-support/core-it-plugins/maven-it-plugin-class-loader/maven-it-plugin-class-loader/pom.xml b/core-it-support/core-it-plugins/maven-it-plugin-class-loader/maven-it-plugin-class-loader/pom.xml
index ed6c2c4..29a6eb2 100644
--- a/core-it-support/core-it-plugins/maven-it-plugin-class-loader/maven-it-plugin-class-loader/pom.xml
+++ b/core-it-support/core-it-plugins/maven-it-plugin-class-loader/maven-it-plugin-class-loader/pom.xml
@@ -44,6 +44,10 @@
   </description>
   <inceptionYear>2008</inceptionYear>
 
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.apache.maven</groupId>
diff --git a/core-it-support/core-it-plugins/maven-it-plugin-model-interpolation/pom.xml b/core-it-support/core-it-plugins/maven-it-plugin-model-interpolation/pom.xml
index b59645d..afdd5eb 100644
--- a/core-it-support/core-it-plugins/maven-it-plugin-model-interpolation/pom.xml
+++ b/core-it-support/core-it-plugins/maven-it-plugin-model-interpolation/pom.xml
@@ -62,6 +62,10 @@
       <version>${project.version}</version>
       <exclusions>
         <exclusion>
+          <groupId>org.apache.maven</groupId>
+          <artifactId>maven-artifact</artifactId>
+        </exclusion>
+        <exclusion>
           <groupId>org.apache.maven.shared</groupId>
           <artifactId>maven-verifier</artifactId>
         </exclusion>
diff --git a/core-it-support/core-it-plugins/maven-it-plugin-project-interpolation/pom.xml b/core-it-support/core-it-plugins/maven-it-plugin-project-interpolation/pom.xml
index 735e8ce..c2994ed 100644
--- a/core-it-support/core-it-plugins/maven-it-plugin-project-interpolation/pom.xml
+++ b/core-it-support/core-it-plugins/maven-it-plugin-project-interpolation/pom.xml
@@ -57,6 +57,10 @@
       <version>${project.version}</version>
       <exclusions>
         <exclusion>
+          <groupId>org.apache.maven</groupId>
+          <artifactId>maven-artifact</artifactId>
+        </exclusion>
+        <exclusion>
           <groupId>org.apache.maven.shared</groupId>
           <artifactId>maven-verifier</artifactId>
         </exclusion>
diff --git a/core-it-support/core-it-plugins/maven-it-plugin-site/pom.xml b/core-it-support/core-it-plugins/maven-it-plugin-site/pom.xml
index 110551e..d44f828 100644
--- a/core-it-support/core-it-plugins/maven-it-plugin-site/pom.xml
+++ b/core-it-support/core-it-plugins/maven-it-plugin-site/pom.xml
@@ -72,6 +72,12 @@
       <groupId>org.apache.maven.reporting</groupId>
       <artifactId>maven-reporting-exec</artifactId>
       <version>1.6.0</version>
+      <exclusions>
+        <exclusion>
+          <groupId>org.apache.maven</groupId>
+          <artifactId>*</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
   </dependencies>
 </project>
diff --git a/core-it-support/maven-it-plugin-bootstrap/src/main/java/org/apache/maven/its/bootstrap/DownloadMojo.java b/core-it-support/maven-it-plugin-bootstrap/src/main/java/org/apache/maven/its/bootstrap/DownloadMojo.java
index 3f41bb5..bf241c6 100644
--- a/core-it-support/maven-it-plugin-bootstrap/src/main/java/org/apache/maven/its/bootstrap/DownloadMojo.java
+++ b/core-it-support/maven-it-plugin-bootstrap/src/main/java/org/apache/maven/its/bootstrap/DownloadMojo.java
@@ -74,7 +74,7 @@
     @Component
     private RepositorySystem repositorySystem;
 
-    @Component
+    @Parameter( defaultValue = "${session}", readonly = true )
     private MavenSession session;
 
     @Override