hg: jdk/sandbox: 8223260: NamingManager should cache InitialContextFactory

[chris.hegarty at oracle.com]

Changeset: 92b01977fde2
Author:    coffeys
Date:      2020-02-09 21:55 +0000
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/92b01977fde2

8223260: NamingManager should cache InitialContextFactory
Reviewed-by: alanb, plevart, dfuchs

! src/java.base/share/classes/module-info.java
! src/java.naming/share/classes/javax/naming/spi/NamingManager.java
+ test/jdk/javax/naming/spi/DummyContextFactory.java
+ test/jdk/javax/naming/spi/DummyContextFactory2.java
+ test/jdk/javax/naming/spi/FactoryCacheTest.java