cassandra: add 'clean' target

Reviewed-by: Nadav Har'El <nyh@cloudius-systems.com>
Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
cassandra: fix incremental build

Currently incremental build will not respect changes of VERSION
variable, so that after updating the repo 'make' will not built the
new version. This change fixes that problem by moving the GET script
to the Makefile with appropriate dependency rules.

Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
tomcat: Add two patches

* Use bio connector explicitly
Linux will use APR connector if it presets. For apple to apple comparsion,
specify connector to use explicitly. Copy ROOTFS/usr/tomcat to linux, you get
the same configuration.

For your reference, 3 http connectors supported:

   org.apache.coyote.http11.Http11Protocol - blocking Java connector
   org.apache.coyote.http11.Http11NioProtocol - non blocking Java connector
   org.apache.coyote.http11.Http11AprProtocol - the APR/native connector

* Do not enable AJP connector
AJP is not used. Disable it by default.

Signed-off-by: Asias He <asias@cloudius-systems.com>
Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
tomcat: Bump to 7.0.54

Signed-off-by: Asias He <asias@cloudius-systems.com>
Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>