in first, please add improvement in pom.xml... need adding execution section:
<executions>
<execution>
<phase>test</phase>
<goals>
<goal>test</goal>
</goals>
</execution>
</executions>
In second, you can create section in pom.xml with variables. And, then, calling it from cmd.
<properties>
<defaultSuiteFiles>
./Sets/Suits/CMS_Administration_SiteBackup_029.xml,
</defaultSuiteFiles>
<suiteFile>${defaultSuiteFiles}</suiteFile>
</defaultSuiteFiles>
</properties>
...
...
<suiteXmlFiles>
<suiteXmlFile>${suiteFile}</suiteXmlFile>
</suiteXmlFiles>
So, result of prototype pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
.....
.....
<properties>
<defaultSuiteFiles>
./Sets/Suits/CMS_Administration_SiteBackup_029.xml,
</defaultSuiteFiles>
<suiteFile>${defaultSuiteFiles}</suiteFile>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<profiles>
<profile>
<id>Base configuration</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<build>
<defaultGoal>install</defaultGoal>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.19.1</version>
<inherited>true</inherited>
<executions>
<execution>
<phase>test</phase>
<goals>
<goal>test</goal>
</goals>
</execution>
</executions>
<configuration>
<suiteXmlFiles>
<suiteXmlFile>${suiteFile}</suiteXmlFile>
</suiteXmlFiles>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
<dependencies>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>3.3.1</version>
</dependency>
</dependencies>
</project>
And use this, how a example for cmd: mvn test -DdefaultSuiteFiles="./YOUR_DIRECTORY/YOUR_SUITE.xml,"
Explanations: in pom.xml you setup xmls for default and place to variable. And, if you will use variable in cmd, you will rewrite values.