Make quietness of :check goal parameterized

[pzygielo]

I propose to introduce parameter to configure if :check shall be quiet (now it is).
New parameter defaults to true, so if not set explicitly old behaviour is observed.

It would allow to reduce build work, for example in client glassfish-build-maven-plugin:pom.xml#L176-L188: two goals are executed:

            <plugin>
                <groupId>org.glassfish.copyright</groupId>
                <artifactId>glassfish-copyright-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>copyright</goal>
                            <goal>check</goal>
                        </goals>
                        <phase>verify</phase>
                    </execution>
                </executions>
            </plugin>

where :copyright reports violations (but does not fail the build), while :check does not report violations but fails the build in case there is any. The work of :check and :copyright is almost the same and done twice is such case.

glassfish-copyright-plugin/src/main/java/org/glassfish/copyright/CheckCopyrightMojo.java

Lines 29 to 42 in 94c7ba4

	public void execute() throws MojoExecutionException {
	log = getLog();
	Copyright c = new Copyright();
	c.quiet = true;
	initializeOptions(c);
	check(c);
	if (c.errors > 0) {
	log.error("Errors: " + c.errors);
	throw new MojoExecutionException("Copyright checking failed");
	}
	}

glassfish-copyright-plugin/src/main/java/org/glassfish/copyright/CopyrightMojo.java

Lines 29 to 36 in 94c7ba4

	public void execute() throws MojoExecutionException {
	log = getLog();
	Copyright c = new Copyright();
	initializeOptions(c);
	check(c);
	}