Add a new package for IcedTea (#4804)

* alsa-lib: new package

* cups: new package

* icedtea: new package

* icedtea: adding JAVA_HOME variable

* alsa: removing placeholder

* icedtea: typo fix

* alsa: fixing formattting

* icedtea: formatting fixes and cleanup

* icedtea: additional cleanup

* jdk: adding provides('java') to jdk, setting jdk to default java.

* icedtea: adding jdk as a dependency

* java: changing depends_on('jdk') and similar entries to depends_on('java')

* icedtea: removing unused imports, trying to placate flake8.

* fastqc: fixing flake8 error

* bazel: fixing typo in java dependency

* jdk: changing provides java to a range

* icedtea: cleaning up. Splitting up checksums.

* icedtea: jdk dependency is build only

etc/spack/defaults/packages.yaml

@@ -23,6 +23,7 @@ packages:
       elf: [elfutils]
       golang: [gcc]
       ipp: [intel-parallel-studio+ipp]
+      java: [jdk]
       lapack: [openblas]
       mkl: [intel-parallel-studio+mkl]
       mpe: [mpe2]