Jaas does not work with tomcat7 Maven plugin

Question

I’m using the JAAS for the safety of my webapp. I declare only one JDBCRealm of the normal Tomcat, passing the bank credentials... follows the context.xml with the Declaration of the Realm:

xml context.

<?xml version='1.0' encoding='utf-8'?>
<Context>

    <WatchedResource>WEB-INF/web.xml</WatchedResource>

    <Realm className="org.apache.catalina.realm.JDBCRealm"

           driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver"

           connectionURL="jdbc:sqlserver://ip:porta;databaseName=dbname;user=user;password=pass"

           userTable="user" userNameCol="username" userCredCol="pass"

           userRoleTable="roles" roleNameCol="rolename"

           digest="SHA-256"/>

</Context>

Installing the Tomcat 7 in my folder and placing this context.xml in the folder TOMCAT7/conf/context.xml and putting the sql server lib in the folder TOMCAT7/lib, authentication with the JAAS works normal.

When trying to use the Maven plugin, authentication does not work. I did it this way:

<plugin>
    <groupId>org.apache.tomcat.maven</groupId>
    <artifactId>tomcat7-maven-plugin</artifactId>
    <version>2.2</version>
    <configuration>
        <port>9090</port>
        <path>/</path>
        <contextFile>src/main/resources/tomcat/context.xml</contextFile>
    </configuration>

    <dependencies>
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <version>${mssql-jdbc.version}</version>
        </dependency>
    </dependencies>
</plugin>

I put the same **context.xml ** in the src/main/Resources/Tomcat/context.xml folder