tools: Rename a local function.

* tools/client-side/store-plaintext-password.py
  (svn_hash_read): Rename to…
  (hash_read): … this.
  (main): Update callers.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1903311 13f79535-47bb-0310-9956-ffa450edef68
1 file changed