RE: Issue - 260 - related changes

When the control flow is defined by links and the value of the suppressJoinFailure attribute is yes, the interpretation of a join condition for activity A that evaluates to false is that A MUST NOT be executed. In this case, the fault bpel:joinFailure MUST NOT be generated. The value of this attribute is inherited by all nested activities, except where overridden by another suppressJoinFailure attribute setting. 

When a target activity is not performed due to the value of the <joinCondition> (implicit or explicit) being false, its outgoing links MUST be assigned a false status according to the rules of section 11.6.2. Link Semantics. This has the effect of propagating false link status transitively along entire paths formed by successive links until a join condition is reached that evaluates to true. This approach is called Dead-Path Elimination (DPE).