WINDUP-1724 Reduce list {source,target,tag} commands execution time

[mrizzi]

On average, an execution of RHAMT CLI with one of the following flags --listTags, --listSourceTechnologies or--listTargetTechnologies tooks about 5 seconds to execute.
In this 5 seconds, about 1.5-2 seconds are spent in a for loop in XMLRuleProviderLoader due to loading of more than 100 rules files, each taking between 15-20 milliseconds.
The remaining 3 seconds are spent for starting and then shutting down Furnace and scanning the classpath for all Java addons.
With the changes in this PR, the sources/targets/tags are not retrieved from rules anymore but they're read from the help.xml file with the result that running every command now take only 3 seconds (sometimes just 2) that is the minimum time for booting Furnace and then turn it off.

[jsight]

Hmm, why does it still have to boot Furnace?

[mrizzi]

Commit 8d62b1c:

• changes List{SourceTechnologies,TargetTechnologies,Tags}Command execution phase from CommandPhase.PRE_EXECUTION to CommandPhase.PRE_CONFIGURATION in order to avoid executing Furnace (@jsight thanks)
• adds AbstractListCommandWithoutFurnace for commands that display list but do not need Furnace for their executions while the old AbstractListCommand denotes commands that need Furnace to be executed (i.e. DiscoverPackagesCommand & ListAddonsCommand)

With these changes the sources/targets/tags are displayed immediately.

[mrizzi]

retest

[mrizzi]

retest

[jsight]

Oh, nice, it finally passed. :)

Merging...