implement new API search-cve-by-product capability

[ryran]

As with /iava endpoint, the API docs haven't been updated yet, but a new feature was just added today to the /cve endpoint: listing by product=REGEX.

[ryran]

$ rhsecapi --help | grep -A5 -- ' --q-product'
  --q-product PRODUCT   Narrow down results by product name via case-
                        insensitive regex (e.g.: 'linux 7' or openstack
                        platform [89]'); the API checks this against the
                        'FIXED_RELEASES' field so will only match CVEs where
                        PRODUCT matches the 'product_name' of some released
                        errata

$ rhsecapi --q-product 'linux [67]' --q-package glibc
[NOTICE ] rhsda: 37 CVEs found with search query

CVE ID         PUB DATE    BUGZILLA  SEVERITY   CVSS2  CVSS3  RHSAS  PKGS
CVE-2016-3075  2016-03-29  1321866   low        3.7    4.5     1      1  
CVE-2015-7547  2016-02-16  1293532   critical   6.8            4      8  
CVE-2015-5277  2015-09-14  1262914   important  3.7            2      2  
CVE-2015-5229  2015-08-21  1256285   low        2.6            2      2  
CVE-2015-1781  2015-04-21  1199525   moderate   5.1            3      3  
CVE-2014-8121  2015-02-23  1165192   low        3.3            1      1  
CVE-2015-0235  2015-01-27  1183461   critical   6.8            5     10  
CVE-2013-7424  2015-01-27  1186614   moderate   5.1            2      2  
CVE-2014-7817  2014-11-20  1157689   moderate   3.6            2      2  
CVE-2014-6040  2014-08-28  1135841   moderate   2.1            2      2  
CVE-2014-5119  2014-07-14  1119128   important  6.9            2      7  
CVE-2014-0475  2014-07-09  1102353   moderate   6.0            1      3  
CVE-2015-1472  2014-02-21  1188235   low        2.6            2      2  
CVE-2015-1473  2014-02-21  1209105   low        2.6            2      2  
CVE-2013-4458  2013-10-22  1022280   low        4.3            1      1  
CVE-2013-7423  2013-09-12  1187109   moderate   1.2            4      4  
CVE-2013-4332  2013-08-20  1007545   moderate   4.4            2      2  
CVE-2013-4237  2013-08-11  995839    moderate   6.8            1      1  
CVE-2013-1914  2013-04-03  947882    low        4.3            2      2  
CVE-2013-0242  2013-01-29  905874    low        4.3            2      2  
CVE-2012-3480  2012-08-12  847715    moderate   4.4            4      3  
CVE-2012-3404  2012-07-11  833703    moderate   6.8            2      2  
CVE-2012-3406  2012-07-11  826943    moderate   6.8            4      3  
CVE-2012-3405  2012-07-11  833704    moderate   6.8            2      2  
CVE-2011-4609  2011-05-05  767299    low        3.3            3      3  
CVE-2012-6686  2011-04-13  1009643   moderate   4.3            2      2  
CVE-2011-1089  2011-03-03  688980    low        3.3            3      3  
CVE-2011-1658  2011-01-12  694873    low        6.2            2      2  
CVE-2011-0536  2011-01-11  667974    important  7.2            2      2  
CVE-2012-0864  2010-11-17  794766    moderate   6.8            4      3  
CVE-2010-3856  2010-10-22  645672    important  7.2            2      2  
CVE-2010-3847  2010-10-18  643306    important  7.2            2      2  
CVE-2011-1095  2010-08-11  625893    low        3.7            3      3  
CVE-2011-1071  2010-08-05  681054    low        5.1            3      3  
CVE-2011-1659  2010-08-05  681054    low        5.1            3      3  
CVE-2009-5064  2009-10-26  692393    low        3.7            3      3  
CVE-2009-5029  2009-06-01  761245    moderate   6.5            3      3