Add hierarchy drop down options to search parameters

Add the hierarchy levels to the search options when searching DA.

New Properties:

#delegatedaccess.search.hideTerm
#false by default. If you set this to true, then the term dropdown option in the search fields will be removed.
#This is useful if you already have term in your hierarchy and you don't want term listed twice in the search
#fields
#ex.
#delegatedaccess.search.hideTerm=true

#delegatedaccess.search.hierarchyLabel.{hierarchyLevel}
#This allows you to set labels for your hierarchy search options. By default it will use the hierarchy level, but you can
#override this by setting the label. For example:
#Hierarchy = school->dept->subj
#delegatedaccess.search.hierarchyLabel.school=School
#delegatedaccess.search.hierarchyLabel.dept=Deptartment
#delegatedaccess.search.hierarchyLabel.subj=Subject