RFR: 8294962: java.base jdk.internal.module package uses ASM to modify and write module-info.class

[Adam Sotona]

8294962: java.base jdk.internal.module package uses ASM to modify and write module-info.class.
This patch converts it to use Classfile API.

Please review.
Thanks,
Adam

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Commit messages:
 - Merge branch 'master' into JDK-8294962-internal-module
 - fixed jdk.internal.classfile.java.lang.constant package name
 - Merge branch 'JDK-8294982' into JDK-8294962
 - removed obsolete javadoc from implementation classes
 - minor fix in CodeBuilder and added test cases to LDCTest
 - EntryMap::nextPowerOfTwo delegates to Long:numberOfLeadingZeros
 - fixed CodeBuilder:constantInstruction for -0.0d and -0.0f values and added test
 - Merge branch 'master' into JDK-8294982
 - fixed new lines at end of file
 - package jdk.internal.classfile.jdktypes moved to jdk.internal.classfile.java.lang.constant
 - ... and 184 more: https://git.openjdk.org/jdk/compare/cdcf5c1e...011a6700

Changes: https://git.openjdk.org/jdk/pull/11368/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11368&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294962
  Stats: 273 lines in 2 files changed: 85 ins; 116 del; 72 mod
  Patch: https://git.openjdk.org/jdk/pull/11368.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11368/head:pull/11368

PR: https://git.openjdk.org/jdk/pull/11368