Validation reports for input ports in PDL services: PDLServiceParameterHealthChecker
Interoperability checker showing dummy explanations
basic level interoperability. it only check if the metadata are the same, and provide explanations and solutions
updating merging pdlclient into interoperability branch
Merge branch 'interoperability' into dev

Conflicts:
	PDL-activity/pom.xml
	PDL-activity/src/main/java/org/purl/wf4ever/astrotaverna/pdl/PDLServiceActivity.java
change unmapable characters in jenkins (accents)
modify comments in checker classes
modify date in comment
modify date in comment
rename names and descriptions of services

Solve some misspelling in services names and descriptions. It also update the services title for some of the services to make it match with the service name.
aladin macro parsing not working in windows
rename descriptions of the artifacts in the service panel. closes #2
rename descriptions of the artifacts (coordinate units). Fixes #2
Change more service descriptions. Fixes #2
#5 system.err --> system.out. Misspelling in msns. replaceAll(' ','_') while looking for ports