CheckSezpozTest: use ToolProvider.getSystemJavaCompiler()
CheckSezpozTest: use ToolProvider.getSystemJavaCompiler()

... instead of calling 'javac' directly.

This is more robust than expecting 'javac' to be in the PATH as long as
we are assuming that the regression tests are run within a JDK -- which
is usually the case because they are run in the context of building
scijava-common.

This fixes http://trac.imagej.net/ticket/1560.

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>

scijava/scijava-common