JBIDE-15398 CDI Builder is sloooow
Methods CDICoreNature.getAllAnnotations() and
DefinitionContext.getAnnotation(String)
are optimazed in case of many dependencies in workspace.

Existing tests for dependent projects must pass.
Set parent pom to Alpha2. Bumped cdi version.
JBIDE-15626 Bump Seam version to 3.5.1 in 4.1.x branch