Address potential error state after good send

Address potential error state after good send

This change addresses the potential to "hide" the good
status of a send in the case where there are multiple
round-robin groups for a message type. The send algorithm
was modified to eliminate the potential edge case and
to report a successful result if the message was accepted
for delivery to at least one group.

Two issues identified by valgrind (use of a potentially
uninitialised variable in a jump) were also corrected.

Intermediate commits:
Signed-off-by: E. Scott Daniels <daniels@research.att.com>
Add error tag to msg

Missing ERR on failure message.

Signed-off-by: E. Scott Daniels <daniels@research.att.com>
Prevent NPE in symtab

Signed-off-by: E. Scott Daniels <daniels@research.att.com>
Adjust unit tests, fix valgrind inddicated issues

Unit tests were added to verify the new get rte function.
Valgrind indicated several places where a conditional was
using a potentially uninitialised variable; these were fixed.

Signed-off-by: E. Scott Daniels <daniels@research.att.com>
Change-Id: I7c0a49713ab3d6fbb8f66e3d286049762433dc58