Enh 0003300: Add global defaults for priotity and severity of new bugs.

M config_defaults_inc.php

• Added $g_default_bug_severity = MINOR;
• Added $g_default_bug_priority = NORMAL;

M bug_report_advanced_page.php
M bug_report_page.php

• Use defaults for severity and priority.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2444 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9