Add new skip install feature flag for dev mode

[cherylking]

Fixes #1646

Requires OpenLiberty/ci.common#398

Need to have a similar PR in ci.gradle as well.

[scottkurz]

So the DevSkipInstallFeatureTest logic is interesting in that it shows a corner case where you never install the features.

The flow does a Liberty install and then later starts dev mode with "-DskipInstallFeature=true" pointing back to the earlier Liberty install, and confirms we don't install the features.

So it shows it is possible to use this parm in a "bad" way and never get the features installed. You could also do a liberty:create and then "liberty:dev -DskipInstallFeature=true" and also never install the features.

That all said, maybe a more straightforward adaptation of this test would be to do the install feature back when we install Liberty and look for the same log messages:

                <configuration>
                    <serverXmlFile>${project.basedir}/resources/basic-dev-project/src/main/liberty/config/server.xml</serverXmlFile>
                    ...
                </configuration>
                <executions>
                    <execution>
                        <id>install-liberty-server</id>
                        <phase>compile</phase>
                        <goals>
                            <goal>create</goal>
                            <goal>install-feature</goal>
                        </goals>
                    </execution>
                </executions>

[scottkurz]

Thx for making the changes.