JBIDE-7969 Empty error message from KB validator

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JBIDE-9021 CDI builder should be declared before WST validation builder in .project.

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JBIDE-8709 Removing class which there are still references too causes error logging/unrelated invalidation errors

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JBIDE-9204 Error when opening workspace with JSF project created with older version

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JBIDE-9055 Make sure all the JBoss Tools project examples have the correct order of CDI, Seam, KB, Validation builders.

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