CT export fails if non-ASCII in protocol

[Ed McDonagh]

As reported by Kari Slyngstad Helland

[Ed McDonagh]

Remove attempt to convert series acquisition protocol to string as it gets done safely later. Refs #644. Remove two uses of str() for cid lookups (although they are safe as we know the contents are ASCII).

→ <<cset 75b682060121>>

[Ed McDonagh]

Modified CT RDSR to enable testing of issue with ref #644 with export with non-ascii protocol name at acquisition level. Modified import test to suit.

→ <<cset ff2e81b82da4>>

[Ed McDonagh]

Added ref #644 to changes

→ <<cset 64d5f6b007ed>>

[Ed McDonagh]

Merged in issue644exportnonascii (pull request #208)

Fixes #644

Approved-by: Ed McDonagh [e-mail]

→ <<cset d86f0692ac55>>