Add dependencies for which versions were hard-coded in bpms layer module...

Add several dependencies for which the versions were hard-coded in the corresponding bpms modules. This allows us to remove the hard-coding of version numbers in the modules.
math 2 is an indirect dependency of org.uberfire:uberfire-io

 +- org.uberfire:uberfire-io:jar:0.4.2-SNAPSHOT:compile
 |  \- org.apache.helix:helix-core:jar:0.6.2-incubating:compile
 |     +- org.apache.commons:commons-math:jar:2.1:compile