Bug 933270 - Allow some xpcshell-tests to run in parallel in mailnews and mail. r=jcranmer

mail/components/test/unit/xpcshell.ini

@@ -1,6 +1,5 @@
 [DEFAULT]
 head = head_mailcomponents.js
 tail = tail_mailcomponents.js
-run-sequentially = Avoid bustage.
 
 [test_about_support.js]

mail/steel/test/xpcshell.ini

@@ -5,7 +5,6 @@
 [DEFAULT]
 head = head_steel.js
 tail =
-run-sequentially = Avoid bustage.
 
 [test_mac_platformIsMac.js]
 run-if = os == 'mac'

mailnews/addrbook/test/unit/xpcshell.ini

@@ -1,7 +1,6 @@
 [DEFAULT]
 head = head_addrbook.js
 tail = tail_addrbook.js
-run-sequentially = Avoid bustage.
 support-files = data/*
 
 [test_basic_nsIAbCard.js]

mailnews/db/msgdb/test/unit/xpcshell.ini

@@ -1,7 +1,6 @@
 [DEFAULT]
 head = head_maildb.js
 tail = tail_msgdb.js
-run-sequentially = Avoid bustage.
 
 [test_enumerator_cleanup.js]
 [test_filter_enumerator.js]

mailnews/extensions/bayesian-spam-filter/test/unit/xpcshell.ini

@@ -1,7 +1,6 @@
 [DEFAULT]
 head = head_bayes.js
 tail = tail_bayesian.js
-run-sequentially = Avoid bustage.
 support-files = resources/*
 
 [test_bug228675.js]

mailnews/extensions/mdn/test/unit/xpcshell.ini

@@ -1,7 +1,6 @@
 [DEFAULT]
 head = head_mdn.js
 tail = tail_mdn.js
-run-sequentially = Avoid bustage.
 
 [test_askuser.js]
 [test_mdnFlags.js]

mailnews/import/test/unit/xpcshell.ini

@@ -1,7 +1,6 @@
 [DEFAULT]
 head = head_import.js
 tail = tail_import.js
-run-sequentially = Avoid bustage.
 support-files = resources/*
 
 [test_bug_263304.js]

mailnews/mime/test/unit/xpcshell.ini

@@ -1,7 +1,6 @@
 [DEFAULT]
 head = head_mime.js
 tail = tail_mime.js
-run-sequentially = Avoid bustage.
 
 [test_EncodeMimePartIIStr_UTF8.js]
 [test_hidden_attachments.js]