hg: code-tools/jtreg: fix latent errors in tests detected by latest jdk9

[jonathan.gibbons at oracle.com]

Changeset: 3e2cff4373c2
Author:    jjg
Date:      2017-04-10 14:27 -0700
URL:       http://hg.openjdk.java.net/code-tools/jtreg/rev/3e2cff4373c2

fix latent errors in tests detected by latest jdk9

! src/share/test/javatest/regtest/data/modlibs/buildAction/usermods/um3/um3_p1/um3_p1_B.java
! src/share/test/javatest/regtest/data/modlibs/compileAction/usermods/um3/um3_p1/um3_p1_C.java
! src/share/test/javatest/regtest/data/modlibs/expect-classes.txt