Versão do Java não compatível ?

Meu arquivo XML

arquivo pom

4.0.0

<groupId>br.com.alura.maven</groupId>
<artifactId>lojaweb</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>war</packaging>

<name>lojaweb Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.alura.com.br</url>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
</properties>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.11</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

<build>
    <finalName>lojaweb</finalName>
    <plugins>
        <plugin>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-maven-plugin</artifactId>
            <version>9.3.7.v20160115</version>

        </plugin>
    </plugins>
</build>

Estou usando a versão java 1.8

ERRos Logs

Description Resource Path Location Type Cannot change version of project facet Dynamic Web Module to 3.1. lojaweb line 1 Maven Java EE Configuration Problem

E

Description Resource Path Location Type One or more constraints have not been satisfied. lojaweb line 1 Maven Java EE Configuration Problem