Add hostname to .javacp

Maven resolved classpath will be stored to .javacp.`hostname` file.
This patch should help on cases where your ONOS directory is
shared between guest and host OS.

Change-Id: I9197a56664d49884a1cde52d34f8165e3af31fad
diff --git a/.gitignore b/.gitignore
index c9e6bc1..70a883c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,7 @@
 .project
 .pydevproject
 .settings
-.javacp
+.javacp*
 target
 onos-logs
 onos.log