[#2271] jOOQ Unit tests fail when not run in CET / CEST

Conflicts:
	jOOQ/src/test/java/org/jooq/test/AbstractTest.java
	jOOQ/src/test/java/org/jooq/test/ConvertTest.java

Conflicts:
	jOOQ/src/test/java/org/jooq/test/ConvertTest.java