Bug 440283 - Modify symlink tests to run on Windows with or without
administrator privileges

Change-Id: I3e050b550e788335035de6e6129c0fa45a428dba
Signed-off-by: Sergey Prigogin <eclipse.sprigogin@gmail.com>
Bug 446689 - Remove redundant calls to haveSymlinks method in SymlinkTest

Change-Id: I54a59016430ad13bcf253401671390bb2fd303ef
Signed-off-by: Sergey Prigogin <eclipse.sprigogin@gmail.com>