PAYARA-1165 allow setting of context root on Payara Micro deployments

[smillidge]

This PR allows to set the context path in two ways:

1. use --contextroot

java -jar payara-micro.jar --deploy myapp.war --contextroot mycontext

2. use --deploy with :root after the file name

java -jar payara-micro.jar --deploy myapp.war:mycontext

Both examples configure a effective root context of /mycontext/

When both are specified the root given with --deploy takes precedence. The --contextroot applies to the first given --deploy that does not specify its context path directly.

java -jar payara-micro.jar --deploy app1.war:foo --deploy app2.war --contextroot bar

This will deploy app1 in /foo/ and app2 in /bar/.

Note: --deploy app.war:/ is the same as --deploy app.war: which all deploy in the root /.
That means a leading / is not necessary but can be given. In contrast a tailing / should not be given and seems to not work. While the configuration keeps it as "Context Root": "/foo/" browsing to /foo or /foo/ forwards to /foo// which fails to resolve to the expected page.

[lprimak]

jenkins test

[Pandrex247]

Windows?

[rdebusscher]

@smillidge --contextroot is ignored when using --deployFromGAV.

Changing the contextroot logic in fish.payara.micro.impl.PayaraMicroImpl#getGAVURLs to the following statements fixes this.

                String contextRoot = artefactMapEntry.getKey();
                if (this.contextRoot == null) {
                    if ("ROOT".equals(contextRoot)) {
                        contextRoot = "/";
                    }
                } else {
                    contextRoot = this.contextRoot;
                }

[smillidge]

@rdebusscher good catch I will fix that

[smillidge]

Now works with deploy from Gav and uses File.pathseparator so will work on windows

[smillidge]

jenkins test please