Add static code analysis support for JavaScript/Python/Ruby/PHP.

Add static code analysis support for JavaScript/Python/Ruby/PHP.

Two JJB project parameters have been introduced:
* 'coverity-search-paths' - space separated list of paths that contain
source code to analyse;
* 'coverity-search-exclude-regexs' - space separated list of file name
regexps to exclude from analysis.

Example:

  project:
    name: 'sdc-coverity'
    jobs:
      - onap-gerrit-maven-coverity
    ...
    coverity-search-paths: 'catalog-ui/src/ openecomp-ui/src/ dox-sequence-diagram-ui/src'
    coverity-search-exclude-regexs: '/node_modules/'

Issue-ID: CIMAN-260
Signed-off-by: Artem Naluzhnyy <A.Naluzhnyy@samsung.com>
Change-Id: I8050a75a731c893ec2173f66d2e881fcc0877ed0