Use ${project.artifactId} insetad of ${artifactId}

 * ${artifactId} is deprecated and maven is showing
   warning
Merge branch 'master' of github.com:droolsjbpm/drools
DROOLS-488 "Pluggable and Encapsulated Knowledge Types"
-Refactored Undecided to Decided.

DROOLS-488 "Pluggable and Encapsulated Knowledge Types"
-introduced _.neg and removed the DFL, JTMS pos/neg fact handle and neg entry point

DROOLS-488 "Pluggable and Encapsulated Knowledge Types"
-Added correct handling of NegConstraint for declared masks
-Fixed FH cloning and NegConstraint cloning

DROOLS-488 "Pluggable and Encapsulated Knowledge Types"
-Negatable support must be turned on for !_.neg constraint injection
[DROOLS-621] DrlDumper does not output traits
[DROOLS-622] DrlDumper does not output enum declarations
[DROOLS-611] Initial abstract fact and property metaclasses
[DROOLS-614] Traits should map non-accessor methods

[DROOLS-614] Traits should map non-accessor methods
[DROOLS-615] Composite PackageDescrs ignore declared enums
[DROOLS-608][DROOLS-611] Integrate traits with TMS; Extract trait logic from KnowledgeHelper
[DROOLS-619] Strongly typed java annotations