pom.xml: updated liquibase to 3.0.8

No functional changes.
Don't show SQL queries in dev environment.
Use JaCoCo for code coverage (instead of Cobertura).

To get coverage report run:
$ mvn clean compile jacoco:prepare-agent test jacoco:report

Because Cobertura doesn't work with Java7.

Fix #146
CustomUserDetailsService: remove unused import.

Correction for ca37dbd8e916a9cfda6032a78e6246c949a17a6b commit.

Reported by CheckStyle.

No functional changes.
UserService: remove unused import.

Correction for 76f5449418b5b68be1da31b3164258b914612a05 commit.

Reported by CheckStyle.

No functional changes.
Rephrase some of log messages.

No functional changes.
Run WhenAnonymousUserAddSeries test case.

Should be in d54525d2e06ad05b960b6a267a724146d6af74bb commit.

No functional changes.
Run WhenAdminAddSeries test case.

Should be in ca37dbd8e916a9cfda6032a78e6246c949a17a6b commit.

No functional changes.
test-country-italy.sql: corrected country's owner.

Should be in ca37dbd8e916a9cfda6032a78e6246c949a17a6b commit.

No functional changes.
Validate catalogs' number for existing.

Fix #123
pom.xml: remove tomcat-maven-plugin.

No functional changes.

[ci skip]
SeriesServiceImpl: mark countBy*() methods as read-only.

Should be in 49e6a0cbaa2e86570cce9549796272761241c37e commit.

No functional changes.
Show statistics about amount of countries/series in database.
Show amount of stamps in database.
Replaced dev profile with prod.
Inline TestStrategiesConfig into StrategiesConfig.

No functional changes.
Use FilesystemImagePersistenceStrategy for prod profile.

Addressed to #132
Merge {Test,Prod}DataSource into DataSourceConfig.

No functional changes.
Use || to separate results from input in Spock tests.

@see http://docs.spockframework.org/en/latest/data_driven_testing.html#syntactic-variations

No functional changes.
Disable JSP modification checks on each request for production.

@see http://www.eclipse.org/jetty/documentation/current/configuring-jsp.html