issue2551029: Jinja2 template install error. Issue where template's config.ini not getting updated. Change do_install in admin.py to load config_ini.ini from template before writing tracker's config.ini. This generates an updated config file for the user on install preserving values required tomake tracker work. Added config_ini.ini files to jinja2 and responsive templates to set required values (template_engine and static_files; static_files resp.). Documented new file in doc/tracker_templates.txt and added tests for new admin.py code.

from roundup.mailgw import parseContent

def summarygenerator(db, cl, nodeid, newvalues):
    ''' If the message doesn't have a summary, make one for it.
    '''
    if 'summary' in newvalues or 'content' not in newvalues:
        return

    summary, content = parseContent(newvalues['content'], config=db.config)
    newvalues['summary'] = summary


def init(db):
    # fire before changes are made
    db.msg.audit('create', summarygenerator)

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#SHA: 538f90cb7f4eb63f77eca252b87afbe037d29c48