Bug 35466: Add skip_indexing parameter to bulkmarcimport.pl

Bug 35466: Add skip_indexing parameter to bulkmarcimport.pl

This patch adds a new optoin to skip indexing to bulkmarcimport.
It also fixes a bug where authorities were being indexed multiple times
during import.

To test:
 1 - Apply patch
 2 - Download the sample files on this bug
 3 - Perform asearch engine search that should retrieve all records( 'a' in Zebra, '*' in ES)
 4 - Note the total (435 in KTD)
 5 - perl misc/migration_tools/bulkmarcimport.pl -b -v --file=bug_35466_b.mrc
 6 - Search again, note increaed by 100
 7 - perl misc/migration_tools/bulkmarcimport.pl -b -v --file=bug_35466_b.mrc --skip_indexing
 8 - Search again, no increase
 9 - perl misc/search_tools/rebuild_elasticsearch.pl -v
10 - Search again, increase, records were added but not initially indexed
11 - Browse to authorities and search as for biblios
12 - perl misc/migration_tools/bulkmarcimport.pl -a -v --file=bug_35466_a.mrc
13 - Search again, note increase
14 - perl misc/migration_tools/bulkmarcimport.pl -a -v --file=bug_35466_a.mrc --skip_indexing
15 - Search again, no increase
16 - perl misc/search_tools/rebuild_elasticsearch.pl -v
17 - Search again, increase, records were added but not initially indexed
18 - Sign off! Hi5!

Signed-off-by: Phil Ringnalda <phil@chetcolibrary.org>
Signed-off-by: Thomas Klausner <domm@plix.at>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>