Merge pull request #7181 from eileenmcnaughton/CRM-17335-2

CRM-17335 toward eliminating use of leaky static

diff --cc CRM/Contribute/BAO/Contribution.php
Simple merge

diff --cc CRM/Dedupe/Merger.php
Simple merge

diff --cc CRM/PCP/BAO/PCP.php
Simple merge

diff --cc CRM/Pledge/BAO/Pledge.php
Simple merge