Style and layout
OPAL-2140 - corrected Jenkins build warnings
Merge pull request #372 from kazoompa/feature-OPAL-2140

OPAL-2140 - corrected Jenkins build warnings
OPAL-2141 Added service to add entities to a identifiers table (allows providing with system identifiers)
OPAL-2126: Manage index schedule modal window as a ModalProvider.
Merge pull request #373 from emorency/OPAL-2084

OPAL-2126: Manage index schedule modal window as a ModalProvider.
OPAL-2126: Fixing test
OPAL-2142 Add/remove identifiers table
Merge pull request #374 from emorency/OPAL-2084

OPAL-2126: Fixing test
* Value.getValue() is never null but throws NullPointerException
* Attribute.getNamespace() is never null but throws NullPointerException
* Attribute.getLocale() is never null but throws NullPointerException
OPAL-2142 Select identifiers table after addition
Merge branch 'master' of https://github.com/obiba/opal
Fix PMD
Fix PMD
Identifiers table summary added
OPAL-2142 import system identifiers modal added