create method factory refactored for ID-166
refactored db persistence factories ID-171
some fixes in the db persistence store. ID-171
minor error checking tweak. ID-171
removed unused imports. ID-171
small tweak to queue manager to use the in-built blocking queue ID-171
small fix to persistence store, comments in queue manager class ID-171
Merge pull request #5 from securekey/attr-save-refactor

Attr save refactor
Merge branch 'endpoints-skeleton' of ssh://github.com/securekey/openmidaas-android-lib into shipping-and-cc
changes shipping address to address. setter methods for address and cc values. save function now validates attribute value before saving. ID-171