Bug 7060: GetMemberDetails unnecessary in C4::Circulation

Bug 7060: GetMemberDetails unnecessary in C4::Circulation

Replaces all instances of GetMemberDetails with the more efficient GetMember.  Since
no hash values other than the borrowers table's fields are used in this module, the
transition is safe.

To test:

1.  Checkout a material; the page should load without error
2.  Renew a material: the page should load without error
3.  Return a material: the page should load without error

The above test plan invokes all the subroutines affected by this patch; any call to an undefined
value in a hashref should give a warning

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>