Clean up output buffers between tests.

Some of the tests I was running were erroring with a deprecation
warning. That was happening inside a Smarty template and the Smarty
stuff makes heavy use of ob_start and friends. When an error happens
inside an ob_start, the corresponding ob_end_clean isn't happening and
somewhere else in phpunit the output gets flushed. This causes the
output to get flushed to the screen which messes up the display of the
results of running phpunit.

This fix has us clear out all of the output buffers (if any) in the
tearDown for every test. That seems to fix this problem.
CRM-15713 - Case ajax fixes
CRM-15713 - CRM_Case_BAO_Case::accessCase - Split off from getCases().

This allows us to explicit control over more parameters (eg case_status_id)
and to improve performance (by focusing on the specific $caseId).
Merge branch 'phpunit-ob-fix' of https://github.com/giant-rabbit/civicrm-core into phpunit-ob-fix

Conflicts:
	tests/phpunit/CiviTest/CiviUnitTestCase.php
Merge pull request #4732 from yashodha/phpunit-ob-fix

Phpunit ob fix
Merge pull request #4729 from totten/colemanw-CRM-15713

CRM-15713 - Case ajax fixes
Update version to 4.5.6
CRM-14696 - make sold out options a bit easier to see by making the entire option italic and grey.

----------------------------------------
* CRM-14696:
  https://issues.civicrm.org/jira/browse/CRM-14696
CRM-14696 - make sold out options a bit easier to see by making the entire option italic and grey.

----------------------------------------
* CRM-14696:
  https://issues.civicrm.org/jira/browse/CRM-14696
Merge pull request #4738 from davecivicrm/CRM-14696a

CRM-14696 - make sold out options a bit easier to see by making the enti...
CRM-14696 - Fixes for text input price field sold out display. Also spacing and font size improvements.

----------------------------------------
* CRM-14696:
  https://issues.civicrm.org/jira/browse/CRM-14696
Merge pull request #4743 from davecivicrm/CRM-14696a

CRM-14696 - Fixes for text input price field sold out display. Also spac...
Merge branch '4.5' of https://github.com/civicrm/civicrm-core

Conflicts:
	CRM/Case/BAO/Case.php
	sql/civicrm_generated.mysql
	xml/version.xml
Merge branch 'master' of git://github.com/civicrm/civicrm-core into Tests
Webtests Fixes