Adds test for websocket

Ticket: 2695

diff --git a/tests/websocket/README.md b/tests/websocket/README.md
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+++ b/tests/websocket/README.md
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+# Test Description
+
+Test websocket protocol
+
+## PCAP
+
+From the issue https://redmine.openinfosecfoundation.org/issues/2695
+
+## Related issues
+
+https://redmine.openinfosecfoundation.org/issues/2695

diff --git a/tests/websocket/basic_websockets.pcap b/tests/websocket/basic_websockets.pcap
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Binary files /dev/null and b/tests/websocket/basic_websockets.pcap differ

diff --git a/tests/websocket/test.rules b/tests/websocket/test.rules
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+++ b/tests/websocket/test.rules
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+alert websocket any any -> any any (msg:"header frame"; flow:established,to_server; frame:websocket.header; content:"|81 88|"; sid:1;)
+alert websocket any any -> any any (msg:"pdu frame"; flow:established,to_client; frame:websocket.pdu; content:"|81 15|version,hybi-draft-13"; sid:2;)
+alert websocket any any -> any any (msg:"ws opcode"; flow:established,to_client; websocket.opcode:text; sid:3;)
+alert websocket any any -> any any (msg:"ws mask"; flow:established,to_server; websocket.mask:>0; sid:4;)
+alert websocket any any -> any any (msg:"ws fin"; flow:established,to_server; websocket.flags:fin; sid:5;)
+alert websocket any any -> any any (msg:"ws pl"; flow:established,to_server; websocket.payload; content:"version,"; sid:6;)

diff --git a/tests/websocket/test.yaml b/tests/websocket/test.yaml
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+++ b/tests/websocket/test.yaml
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+requires:
+  min-version: 8
+
+args:
+- -k none
+
+checks:
+- filter:
+    count: 1
+    match:
+      event_type: alert
+      alert.signature_id: 1
+- filter:
+    count: 1
+    match:
+      event_type: alert
+      alert.signature_id: 2
+- filter:
+    count: 1
+    match:
+      event_type: websocket
+      websocket.mask: 3803616749
+      websocket.opcode: text
+- filter:
+    count: 14
+    match:
+      event_type: alert
+      alert.signature_id: 3
+- filter:
+    count: 3
+    match:
+      event_type: alert
+      alert.signature_id: 4
+- filter:
+    count: 3
+    match:
+      event_type: alert
+      alert.signature_id: 5
+- filter:
+    count: 1
+    match:
+      event_type: alert
+      alert.signature_id: 6