Bug-22234 - Fixup for jaldb_tail and other cleanup.
jaldb_context.cpp:

jaldb_get_last_k_records
    1. Update to use proper variable on memset
    2. Set DB to REALLOC for pkey
    3. Free memory allocated for pkey
    4. Removed unnecessary string copy and use of current nonce

jaldb_get_records_since_last_nonce
    1. Added variable for primary key storage
    2. Removed unnecessary string copy and use of current nonce
    3. Switched DB calls to use index instead of primary DB
    4. Switched  function to mirror jaldb_get_last_k_records and work from latest to first and look for network_nonce

test_jaldb_context.cpp
    1. Updated unit tests

jaldb_tail.cpp
    1. changed follow time interval from 10 sec to 1 sec
    2. fixed so -v also provided version
    3. updated usage() text

jaldb_tail.8
    1. Updated text on man page

jal_version.h
    1. Updated jalop version to show 1.0