update extra volumes to allow php config updates; also reload deployment on configmap changes

[jessebot]

• reload deployment on changes to our configmap
• Changes parameter volumeMounts to extraVolumeMounts
• Changes parameter volumes to extraVolumes
• Adds phpConfigs parameter:

# -- PHP Configuration files
# Will be injected in /usr/local/etc/php-fpm.d
phpConfigs: {}
  # www.conf: |-
  #   [www]
  #   user = www-data
  #   group = www-data
  #   security.limit_extensions = .php .css .js .html
  #   pm = dynamic
  #   pm.max_children = 350
  #   pm.start_servers = 100
  #   pm.min_spare_servers = 100